I've come up with a ranking system for bullpen's using basic stats. I use it in my capping.
Higher rating = better bullpen
Rating - Team - IP
-
-
48.59 - Rangers - 75.2
43.52 - Orioles - 99.2
43.42 - Reds - 80.2
42.18 - Yankees - 93.1
41.89 - Cardinals - 74.2
41.19 - Astros - 80.2
41.14 - Athletics - 87
40.96 - White Sox - 77.1
40.72 - Mariners - 87.1
40.7 - Padres - 92.1
40.26 - Pirates - 88
39.71 - Twins - 92
39.07 - Indians - 95
38.8 - Nationals - 83
38.76 - Diamondbacks - 85
38.7 - Rockies - 101.1
38.65 - Red Sox - 100
38.35 - Blue Jays - 78.1
38.19 - Royals - 110.1
38.01 - Rays - 83
37.9 - Marlins - 75.2
37.34 - Dodgers - 83
37.33 - Braves - 95.1
36.42 - Tigers - 89
36.38 - Cubs - 82.2
36.12 - Giants - 74.2
35.48 - Mets - 90.2
35.4 - Brewers - 90.1
35.35 - Angels - 60.2
34.63 - Phillies - 70.1