That list is real interesting. Hader is above average and at least top 10 overall as a closer. He has the best strikeout rate among the group. Only 4 blown saves, but we know he's also blown some tie situations in extras that don't show up in that stat, although some weren't his fault when he was allowed to stretch for 2 innings.
Royals closer MacArthur has a 72% save rate with nearly a 5 ERA. Not scary at all, and a nice opponent to have in the first round (fingers crossed)
Tigers have a good closer in Foley, I hope they draw the 5th seed.
Guardians have the best closer in the league with Clase, and he might even get some Cy Young votes this year, but their starters will give up a lot of runs before you get to him.
Do the Orioles even have a new closer? Kimbrel was released after sucking for most of the season.
Yankees Clay Holmes is at 69% save rate with 13 blown saves, which is awful. He shouldn't scare anyone.
Not too much to worry about, the Astros probably have the best overall pitching staff in the AL playoffs, which should give them an edge in any of these matchups.