Marioano Rivera lost 6 games in 2001, 5 in 2006 and 5 in 2008. Hoffman lost 6 in 1993, 5 in 1996, 7 in 2000, 5 in 2002, 6 in 2005, 5 in 2007, 6 in 2008. Those guys crack under pressure. Not that I disagree with you, CV tends to walk too many in high leverage situations, it is just that looking at losses is such a bad methodology for discussing the issue. CV should be used in MR, not as a setup or closer.