McGee, who turns 30 on Aug. 6, is 21-11 with a 2.77 ERA in 297 games over six seasons, all with the Rays. Earlier this offseason he avoided arbitration by agreeing to a one-year, $4.8 million contract and is under club control through the 2017 season. McGee was 1-2 with a 2.41 ERA in 39 games last season.
The Rockies' other projected lefties are Boone Logan, who has struggled with injury and inconsistency in his first two seasons of a three-year, $16.5 million contract with Colorado (combined 2-6, 5.37 ERA in 95 games), and Christian Friedrich, a former top pick who went through growing pains in his first full season as a reliever (0-4, 5.