Here's a look at pitchers potentially helped by new catchers. Our Rockies blogger, Richard Bergstrom, points out that Colorado has signed Nick Hundley. Neither Wilin Rosario nor Michael McKenry graded out well in framing last year, but Hundley doesn't appear to be a superstar framer either: -0.6 runs below average in 2014 between the Padres and Orioles, -4.3 in 2013 and -9.3 in 2012. Yasmani Grandal, his teammate in San Diego, graded out much higher all three seasons. And Hundley doesn't have much of a bat, so I'm not sure he's anything more than a backup.
Anyway, here are some pitchers moving on to new catchers that you should consider:
Yovani Gallardo, Rangers: Aside from those coming back from injuries, no pitcher has more red flags this year than Gallardo. He moves from the NL to the deeper lineups of the AL; he moves to Texas, where the ball flies out to right field; his strikeout rates have declined each of the past two seasons; and now he goes from excellent pitch framer Jonathan Lucroy to Robinson Chirinos (doesn't rate well) and Carlos Corporan (has at least graded out above average the past two seasons).
Ervin Santana, Twins: He hasn't exactly hasn't received much help from his catchers the past few years. Salvador Perez, despite winning back to back Gold Gloves, hasn't graded out as a good pitch framer and the Braves' various catchers also rated out below average last year. Twins catcher Kurt Suzuki has consistently graded poorly according to StatCorner.com. So aside from moving back to the AL to a team with a poor defensive outfield, Santana's not going to get much help from his catcher.
Tyson Ross, Padres: Rene Rivera caught 26 of his 31 starts last year and Ross had a 2.62 ERA with Rivera catching. Derek Norris grades out at +5 runs over the past two seasons so he's OK at framing, but he did struggle throwing out base stealers last year (just 17 percent), and Ross doesn't hold runners well (he allowed 31 steals, third most in the majors).
Jarred Cosart, Marlins: Jarrod Saltalamacchia rated as StatCorner's worst pitch framer in 2014. What's interesting is that after coming over from the Astros midseason last year, the Jarred-Jarrod combo actually did well together with Cosart posting a 2.09 ERA in 51.2 innings. Cosart is a pitcher who has struggled with walks in the past; he relies more on a movement from his cut fastball than precise location. We'll see if they can repeat last year's success.
Garrett Richards, Angels: We've got a small sample size here so don't read too much into it, but Richards had a 1.25 ERA in nine games with Hank Conger catching and 3.46 in 17 games with Chris Iannetta. He'd be hard-pressed to repeat his 2014 performance anyway, but it won't help losing Conger.