Andrew Chafin
Former Cub and Oakland Athletic in 2021, Chafin had a stellar campaign, posting a 1.83 combined ERA in 71 appearances.
In addition to the great ERA, Chafin had his best season WHIP and although his strikeout ratio was lower than his career average he did have his second highest strikeout total and a solid 0.5 home run per nine innings.
Chafin is definitely the cheapest option on the list for potential ‘pen additions, but he still would be a quality arm for the Astros, so long as he can repeat his ’21 campaign.