Shaw has a vesting option in his contract for $9 million in 2021 based on appearances. If he clears waivers, a team can pick him up for the prorated minimum but the vesting option still would apply.
The right-hander spent the previous two seasons in Colorado after previous stops in Arizona and Cleveland. He appeared in 70 games in 2019, posting a 5.38 ERA.
McGee has a similar contract situation to Shaw, with a vesting option for $9 million that includes a $2 million buyout. The lefty spent the previous four seasons in Colorado after a six-year run with Tampa Bay.
The moves mean only Wade Davis remains from a 2018 offseason for Colorado in which it spent $100 million-plus on relievers.