Feb. 15 (Bloomberg) -- Under Armour Inc.'s athletic clothing will be the first product advertised among the ivy on the walls of Wrigley Field.

The company and Major League Baseball's Chicago Cubs agreed to place Under Armour's logo on 7-foot-by-12-foot doors in the ballpark's right- and left-field brick walls.

The doors had been painted green and weren't covered with ivy, which has been a Wrigley Field trademark since the 1930s. The Cubs were the last major league team without advertising on outfield walls.

Financial terms of the three-year agreement weren't disclosed in a press release distributed on Business Wire.

The Cubs spent about $300 million since last season on new players such as outfielder Alfonso Soriano and manager Lou Piniella. Soriano, who signed an eight-year, $136 million contract in November, has an endorsement agreement with Baltimore-based Under Armour.

``The Cubs are committed to finding alternative and creative revenue streams to build the championship team our fans richly deserve,'' said Jay Blunk, the team's marketing director.

Wrigley Field, built in 1914, is the second-oldest baseball stadium in the U.S., behind 95-year-old Fenway Park, home of the Boston Red Sox. Under Armour also advertises on the ``Green Monster,'' Fenway's 37-foot tall left-field wall.

The agreement with the Cubs also gives Under Armour advertising rights to signs behind Wrigley Field's home-plate area.

Shares of Under Armour fell seven cents to $47.49 at 4 p.m. in New York Stock Exchange composite trading.

To contact the reporter on this story: Michael Buteau in Atlanta at mbuteau@bloomberg.net.

Last Updated: February 15, 2007 17:07 EST