The harder knuckleball could serve as a bridge between his 93-94 mph fastball and the Yoshi. “After I saw what he could do with this,” Whitten said, “I said, ‘OK, this is usable.’” ...

It's the fastest knuckleball ever recorded, at 88.5 mph. The 27-year-old has a chance to become MLB's next knuckleballer — and the Tigers' first since Steve Sparks in the early 2000s.

It's the fastest knuckleball ever recorded, at 88.5 mph. The 27-year-old has a chance to become MLB's next knuckleballer — and the Tigers' first since Steve Sparks in the early 2000s.