Rosetta Resources Inc. Updates 2013 Guidance, Expands and Extends Credit Agreement and Announces Borrowing Base Increase

Rosetta Resources Inc. Updates 2013 Guidance, Expands and Extends Credit
Agreement and Announces Borrowing Base Increase

HOUSTON, April 15, 2013 (GLOBE NEWSWIRE) -- Rosetta Resources Inc.
(Nasdaq:ROSE) ("Rosetta" or the "Company") today announced 2013 guidance
updates for capital, production, and expenses. The changes reflect the
proposed May 2013 acquisition of Permian Basin assets previously announced on
March 15. The Company also announced the amendment of its Senior Revolving
Credit Facility ("Credit Facility") which increases the borrowing base and
extends the maturity date.

First Quarter 2013 Operational Preview

Rosetta's total production for the quarter is expected to average an all-time
record of 47.0 thousand barrels of oil equivalent per day ("MBoe/d"), up 39
percent from the same period in 2012 and 6 percent from the prior quarter. Oil
production will be 12.4 thousand barrels ("MBbls") per day, an increase of 67
percent from the prior year and 6.4 percent over the fourth quarter daily
production rate. The Company expects total production for the quarter to be 62
percent liquids. In the first quarter of 2013, Rosetta made capital
investments of approximately $161 million, drilling 24 gross wells with a 100
percent success rate and completing 17 wells.At the end of the quarter, 38
drilled wells were awaiting completion.

The following table details Rosetta's Eagle Ford gross well completion
activity by area:

As of          1Q 2013   Completed Drilled Awaiting
March 31, 2013 Completed To Date   Completion
Gates Ranch    12        108       21
Briscoe Ranch  0         4         7
Karnes Trough  0         17        7
Central Dimmit 4         9         2
Lopez          0         0         1
Encinal        0         4         0
Eagle Ford     16        142       38

After giving effect to the pending acquisition, Rosetta's first quarter total
production would have been 49.5 MBoe/d, including oil production of 14.4 MBbls
per day.Capital investments for the quarter would have totaled approximately
$206 million.March production would have been approximately 50 MBoe/d,
including 2.9 MBoe/d from the Permian assets.

2013 Capital Outlook

The Company's 2013 capital guidance range will be revised upward from
$640–$700 million to $840–$900 million.The 2013 capital program is based on a
five to six-rig program in South Texas and a Delaware Basin program with three
rigs increasing to six rigs during the year.Approximately $600 million will
be spent for development activities primarily located in the liquids-rich
window of the Eagle Ford shale in South Texas, including about $55 million
allocated to facilities projects. Approximately $175 million will be
allocated to operated and non-operated development activity in the oil-rich
Delaware Basin, including approximately $7 million for facilities projects.In
addition, the guidance range now includes approximately $25 million of
capitalized interest related to the pending acquisition. The remainder of the
capital plan includes allocations for new ventures activity and other
corporate capital. 

2013 Production and Expense Outlook

Based on the revised capital guidance and assuming a closing date for the
Permian assets on or before May 14, 2013, Rosetta expects full year average
daily production to range from 51–55 MBoe/d or approximately 40 percent
year-over-year production growth.The projected 2013 exit rate is anticipated
to range from 56–60 MBoe/d, including oil and total liquids production of
16–19 MBbls per day and 35–38 MBoe/d, respectively.

Upon closing of the pending acquisition, Rosetta expects about a three percent
average increase in 2013 total cash costs plus depletion, depreciation and
amortization ("DD&A") on a unit basis, primarily due to higher lifting costs
and interest expense generally associated with assets in the Permian Basin as
compared to assets in the Eagle Ford area.Total lifting costs, including
direct lease operating expense, workover expenses, insurance, and ad valorem
tax, are anticipated to range from $3.38–$3.72 per Boe in 2013. A summary of
the Company's cost per unit expense guidance for full year 2013 is outlined in
the attached "Summary of Expense Guidance" table.

Financing Update

Rosetta announced that it has amended its Credit Facility to provide a maximum
credit amount of $1.5 billion, revised from the previous amount of $750
million. The semi-annual borrowing base redetermination was recently completed
for the Credit Facility and effective April 12, 2013 the Company's borrowing
base increased from $625 million to $800 million.Rosetta further indicated
that the maturity date of the agreement has been extended to May 2018. As of
April 15, 2013, after paying a $38.4 million deposit that will be applied
against the payment of the acquisition purchase price at closing, the Company
had $305 million outstanding under the Credit Facility.

Rosetta Resources Inc. is an independent exploration and production company
engaged in the acquisition and development of onshore energy resources in the
United States of America.The Company holds a leading position in the Eagle
Ford area in South Texas, one of the nation's largest unconventional resource
plays.Rosetta is based in Houston, Texas.


Forward-Looking Statements

This press release includes forward-looking statements, which give the
Company's current expectations or forecasts of future events based on
currently available information. Forward-looking statements are statements
that are not historical facts, such as expectations regarding completion of
the proposed acquisition, drilling plans, including the acceleration thereof,
production rates and guidance, proven reserves, resource potential,
incremental transportation capacity, exit rate guidance, net present value,
development plans, progress on infrastructure projects, exposures to weak
natural gas prices, changes in the Company's liquidity, changes in acreage
positions, expected expenses, expected capital expenditures, and projected
debt balances. The assumptions of management and the future performance of the
Company are subject to a wide range of business risks and uncertainties,
including the risk that the transaction with Comstock may not close, and there
is no assurance that these statements and projections will be met. Factors
that could affect the Company's business include, but are not limited to: the
risks associated with drilling and completion of oil and natural gas wells;
the Company's ability to find, acquire, market, develop, and produce new
reserves; the risk of drilling dry holes; oil, liquids and natural gas price
volatility; derivative transactions (including the costs associated therewith
and the abilities of counterparties to perform thereunder); uncertainties in
the estimation of proved, probable, and possible reserves and in the
projection of future rates of production and reserve growth; inaccuracies in
the Company's assumptions regarding items of income and expense and the level
of capital expenditures; uncertainties in the timing of exploitation
expenditures; operating hazards attendant to the oil and natural gas business;
drilling and completion losses that are generally not recoverable from third
parties or insurance; potential mechanical failure or underperformance of
significant wells; midstream and pipeline construction difficulties and
operational upsets; climatic conditions; availability and cost of material,
equipment and services; the risks associated with operating in a limited
number of geographic areas, as well as in new areas as a result of the
Comstock transaction; actions or inactions of third-party operators of the
Company's properties; the Company's ability to retain and hire skilled
personnel; diversion of management's attention from existing operations while
pursuing acquisitions or dispositions; the Company's ability to integrate the
newly acquired assets and operations, including the assets to be acquired from
Comstock; availability and cost of capital; the strength and financial
resources of the Company's competitors; regulatory developments; environmental
risks; uncertainties in the capital markets; general economic and business
conditions (including the effects of the worldwide economic recession);
changes in commodity prices that were not anticipated in the acquisition of
the assets and operations from Comstock; industry trends; and other factors
detailed in the Company's most recent Form 10-K and other filings with the
Securities and Exchange Commission. The Company has not completed its review
of the results at the first quarter of 2013 and there is a risk that
adjustments to the results applicable to the first quarter of 2013 stated
herein may need to be made upon completion of such reviews.If one or more of
these risks or uncertainties materialize (or the consequences of such a
development changes), or should underlying assumptions prove incorrect, actual
outcomes may vary materially from those forecasted or expected. The Company
undertakes no obligation to publicly update or revise any forward-looking
statements except as required by law.

References to quantities of oil or natural gas may include amounts that the
Company believes will ultimately be produced, but are not yet classified as
"proved reserves" under SEC definitions. We use the term "net risked
resources" to describe the Company's internal estimates of volumes of natural
gas and oil that are not classified as proved developed reserves but are
potentially recoverable through exploratory drilling or additional drilling or
recovery techniques.Estimates of net risked resources are by their nature
more speculative than estimates of proved reserves and accordingly are subject
to substantially greater risk of actually being realized by the
Company.Estimates of net risked resources may change significantly as
development provides additional data, and actual quantities that are
ultimately recovered may differ substantially from prior estimates.

We have filed a registration statement (including a prospectus) with the SEC
for the offering of our equity and debt securities to which this communication
relates. Before you invest, you should read the prospectus in that
registration statement and other documents we have filed with the SEC for more
complete information about us and our equity and debt offerings. You may get
these documents for free by visiting EDGAR on the SEC website at
Alternatively, we, any underwriter or any dealer participating in the equity
or debt offering will arrange to send you the prospectus if you request it by
calling toll-free at (800) 221-1037 (equity) or at (800) 245-8812 (debt).

Rosetta Resources Inc.
Summary of Expense Guidance – Pro Forma Acquisition
(Average Costs per Boe)
$/BOE                                   2013 Full Year
Direct Lease Operating Expense          $2.55 -- $2.80
Workover Expenses                       0.01   -- 0.01
Insurance                               0.10   -- 0.11
Ad Valorem Tax                          0.72   -- 0.80
Treating and Transportation             3.85   -- 4.25
Production Taxes                        1.50   -- 1.65
DD&A                                    11.95  -- 13.15
G&A, excluding Stock-Based Compensation 3.30   -- 3.65
Interest Expense                        1.60   -- 1.75

CONTACT: Investor Contact:
         Don O. McCormack
         Vice President, Treasurer and Chief Accounting Officer
         Rosetta Resources Inc.

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