Barnes isn't on the roster for the ALDS, Bill Koch of The Providence Journal reports.
Barnes earned 24 saves during the 2021 campaign, but he struggled across the final two months of the season and recorded a 9.26 ERA and 2.23 WHIP in 11.2 innings since the start of August. Adam Ottavino will likely be the favorite for ninth-inning duties during the postseason series against the Rays.