The Rockies really need a left-handed reliever in the bullpen that they can rely on as on their 28-man roster, they do not have one that they can trust.
James Pazos has struggled and the Rockies have had him back and forth between their alternate training site in the last week with some of their bullpen changes and Phillip Diehl, even after his scoreless 1 2/3 innings of work on Friday, still has an ERA of 8.31.
What they need is a guy like Tony Watson.
In 2020, Watson, 35, has pitched to an ERA of 1.04 in 8 2/3 innings and to a WHIP of 0.692. He has only allowed five hits, one walk, and struck out eight in that span.
The problem with Watson is that he pitches for the Giants so they may be unwilling to trade with the Rockies since the two teams are in the same division (and the Rockies may not want to either and have a prospect burn them for years to come in a small trade).
He is a free agent after the season so the Rockies would likely not have Watson on the team for long. Even if they did resign him, he’s already 35 so he would not command a long-term contract.