I agree with akmanak that Baldelli has proven himself to be a weak manager. He all too often makes bad in game decisions, bringing in the wrong pitcher or leaving someone in too long. Also I have seen several runs given up because hitters are getting hits through the shift. Harper has proven to be the guy you bring in when someone is in trouble or you really need to win the game as they did today and he responds. Today Harper should be in the 7th and Rogers for two innings. At least (since,admittedly he often uses May in the 7th) he should bring Harper in when May looked like he was struggling. He had that determination to change pitchers when they looked bad in the Indian series but not in the past two days.
Twins lost a two game series at home without using their two best relievers. Should not happen.
See bolded. If anything, he might have took Perez out too soon today.
caveats: I didn't see the game, and according to the article Perez had a rough go in the 4th and 5th, but it looks like the 6th went well enough, and the bottom of the Mets order was due up in the 7th.
Day to day, that's probably the toughest decision a manager has to make. Not always obviously, but day in, day out, is when to give your starter one more batter or one more inning. In general I lean towards "leave 'em in, let 'em work out of it" with the starter, myself. Though with limited catcher visits nowadays maybe that idea should change.