Justin Timberlake is joining the cast of the baseball film "Trouble With the Curve." He joins a cast that includes Clint Eastwood and Amy Adams in the Warner Bros. motion picture. In the baseball drama, Eastwood portrays an aging baseball scout with poor eyesight who heads on the road with his daughter (Adams) to check out one last top prospect in Atlanta. Variety reports Timberlake will play the role of Eastwood's buddy, a former pitcher who now scouts for the Yankees.