I'm not worried about Mo at all. First of all, in his prime he still blew more saves against the Red Sox than all other teams combined. The Red Sox, and Fenway Park, have always had Mo's number. Plus, both the home run given up by Beckett to Nunez earlier in the game and the double given up by Mo were Fenway park specials which would have been can of corn outs at any other ball parks. Second, if Nunez knew how to play third base, and covered when Mo played the poor bunt, Scutaro would have been meat at third. So I don't see the blown save in Boston as a big deal.
He threw up a 3-2 meatball to Abreu in the second game, its that simple. I would guess he figured Abreu, who had hit only 4 homers all season prior to that game, wasn't going to hit one out. He was wrong. Life goes on.
I would still hand Mo the ball in every save situation without a moments hesitation. As George pointed out, even 80% of Mo is better than almost any other closer in the game.
One last point: If Girardi doesn't stand up to Cashman and take A.J. Burnett out of the rotation, he has no guts. Burnett is not even the 6th best option as a starter for the Yankees right now (I would rather see Nova, Hughes or even one of the killer bees start, when I see Burnett is starting I just say to myself, "well, we lose tonight"), and cannot be counted on to make a start without giving up a minimum of one horrible 4+ run inning. Ivan Nova needs to start every five days, because he is having a Petitte like rookie season, and has the stuff to be the number two starter the Yankees so desperately need. CC, Nova and Colon could be a viable playoff rotation for the Yankees. Burnett was another Cashman miistake, and frankly, I would waive him and hope some stupid team puts in a claim.