The Cubs have traded infielder-outfielder Jake Fox and infielder Aaron Miles to the Athletics for pitcher Jeff Gray, pitcher Ronny Morla and infielder-outfielder Matt Spencer. Fox was versatile player for the Cubs last season, who hit .259 with 11 home runs in 2009. He could play the field for the A's, but he'll likely see most of his at-bats come from DH or first base. 

Miles is an interesting acquisition for the A's. Miles played in only 74 games this past season, and was far from impressive hitting just .185. However, he can play second, third, and short, which should help solve some of the A's infield issues.

Gray, 27, appeared in 24 games for the A's last season, posting a 3.74 ERA and 19 strike outs to 4 walks. He'll be given a shot to crack the Cubs' bullpen next season, but likely will start in Triple-A.

Morla, 21, is a hard throwing right hander who is dealing with some control issues. He struck out 73 to just 24 walks, but can't break out of the Low-A league. The Cubs may decide that converting him to a full-time reliever could pay dividends down the road.

Spencer, 22, hit well after joining Double-A, compiling a .294 average with 9 home runs and a .347 on-base percentage. He'll likely start in Double-A in 2010.