That's why I use ERA- at times in these discussions, Fangraphs lets you get those stats for starters and relievers separately. You can also easily make custom player lists there for comparison. Here's your list at Fangraphs by career relief ERA-: http://www.fangraphs.com/leaders.aspx?pos=all&stats=rel&lg=all&qual=0&type=1&season=2015&month=0&season1=2005&ind=0&team=0&rost=0&age=0&filter=&players=7441,6033,3840,10534,4301,6324,8110,2895,6475,3926&sort=14,a