The Chicago Cubs baseball franchise, accusing Under Armour Inc. of reneging on a $10.8 million, five-year sponsorship agreement, sued the athletic-wear maker. In a complaint filed Jan. 22 in U.S. District Court in Chicago, the ball club said the garment-maker agreed in principle to the deal and is still using Cubs players and the team's stadium, Wrigley Field, in advertisements. The Baltimore-based maker of perspiration-absorbent shorts and shirts told the Cubs in a Dec. 12 letter it wouldn't sponsor them next season and "would not meet any of its obligations under the agreement," according to the team's complaint, which seeks full payment of the contract price. "Under Armour's abrupt, unilateral action has left the ball club with no choice but to file suit to enforce its rights," the team said in a statement.