Joe Kelly threw a football to improve his curveball

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Joe Kelly has impressed onlookers in Cardinals camp with his improved curveball and Derrick Goold of the St. Louis Post Dispatch writes that the right-hander credits throwing a football during the offseason for the change:

Kelly said by throwing the football he was able to find an arm slot that he could consistently use and a shorter arm swing that adds to his deception. He was able to condition his hand’s release for better control. He shifted his usual grip on the curve to meet the new arm slot.The righty acknowledged that he worried about “losing velocity” by making the change. But he hasn’t.

Kelly stepped into the Cardinals’ rotation down the stretch last season and was fantastic, going 9-2 with a 2.09 ERA, but St. Louis’ impressive starting pitching depth means he’s not even guaranteed to be a starter this season. Goold notes that Kelly is one of seven starters competing for four openings behind Adam Wainwright, so that’s where the improved curveball could factor in.

And, really, Sam Bradford’s gripon the Rams’ starting job can’t be that secure anyway.

Twins will not pick up Glen Perkins’ 2018 option

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The Twins have informed reliever Glen Perkins they will not pick up his 2018 club option worth $6.5 million, MLB.com’s Rhett Bollinger reports. Instead, he will be paid $700,000 per his buyout clause.

Perkins, 34, has pitched a total of 7 2/3 innings over the last two seasons due to shoulder and biceps injuries. Bollinger adds that the two could come to terms on a minor league deal, but if they can’t reach an agreement, the lefty is likely to retire.

From 2011-15, Perkins emerged as one of the better relievers in baseball, making three All-Star teams. He compiled an aggregate 2.84 ERA with 340 strikeouts and 73 walks across 313 1/3 innings.