I asked Tom Tango about clutch stats last year on here, it's basically noise from year to year, with impact being negligible...
https://www.bluejaysmessageboard.com/threads/10984-Batting-Adjustments?p=1718265&viewfull=1#post1718265
Personally, I like using RE24 with relievers used in the fireman role, I believe Yimi was our best guy in that role with runners on.
He also brings it up here for defense...