Lol, not surprising..
The Cardinals' pitchers throw so hard they broke Yadier Molina's mitt
Cardinals pitching staffs of the past, particularly under former pitching coach Dave Duncan, were famous for the prodigious rate at which they generated ground balls. The 2013 staff, however, will be known for young arm after young arm hitting the upper 90′s and even the 100′s on the radar gun. When closer Trevor Rosenthal shut down the Red Sox in 1-2-3 order in Game 2, he threw 11 pitches. All of them were fastballs. One was 95 MPH, one was 96, four were 97, four were 98, and one was 99. Good luck with that, hitters.
Illustrating just how hard Cardinals pitchers throw, ESPN's Jayson Stark provides us with this:
[Molina] laughed and reached into his locker. He dug out his mitt. He held it up for his guests to see. At the top of the pocket, where his palm would be when holding it, the leather was so worn, it was torn. Ripped. Split.
[...]And, he was asked, has that ever happened before — that he chewed threw two game mitts in the same season?
"Never," he said. "First time.
"He had to ditch the first one at the All-Star break, he said. And that's a first, too."It is," he said.
"These guys are throwing 98-99 [miles per hour]. But I don't care about that."
Stark adds in the article that six Cardinals pitchers averaged 93.5 MPH or higher on their fastballs according to Pitch F/X data: Rosenthal (97.3 MPH), Carlos Martinez (96.7), Kevin Siegrist (95.2), Joe Kelly (94.9),Shelby Miller (93.7), and Michael Wacha (93.5).