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Aledmys Diaz is trying to improve his defense with strobe glasses

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MLB.com’s Jenifer Langosch reports that Cardinals’ shortstop Aledmys Diaz has been sporting a new look around Busch Stadium with a pair of “strobe glasses,” technology-enhanced specs designed to help athletes focus on the ball. Like a strobe light, the lenses of these glasses affect a player’s vision by rapidly changing opacity, giving its wearers the illusion that the objects they see are moving more slowly than normal. Once a player adjusts to the new speed of play, they gain a greater sense of control and are able to time their actions with more precision.

Diaz isn’t the first MLB player to utilize the technology, just the first Cardinals’ player to do so. It’s been tested by Bryce Harper, Corey Brown, Tommy Joseph, Austin Hedges and Joe Mauer, among others around the league, and has been used for everything from refining a catcher’s reflexes behind the plate to tweaking a hitter’s ability to track a pitch. Per Langosch, Diaz has been using the glasses to hone in on the ball during pregame drills, increasing both his confidence and response time on the field and improving his defense at short.

The shortstop has been the focus of some concern this season after seeing a sizable dip in his production at the plate, and his five fielding errors, 0.6 UZR and 0.6 fWAR haven’t helped matters, either. He sustained a minor thumb injury during an at-bat on Friday night, and was left off of the Cardinals’ starting lineup on Saturday, though manager Mike Matheny didn’t rule out his ability to pinch-hit during the series. While the strobe glasses are a good start, Diaz will need more than a pair of specs to match the spotlight-worthy performance he turned out during his rookie season in 2016.

Carlos Carrasco pitches during game action

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Indians starter Carlos Carrasco was diagnosed with leukemia earlier this summer. He’d been out since June. Despite that diagnosis, he and the Indians insisted that he would make every effort to come back this year. Yesterday he took a big step in that direction, making his first rehab appearance at Double-A Akron.

He only tossed one inning, walking one batter and striking out another. He thew 16 pitches but cranked it up to 97 with his first offering. Not too shabby.

It’s unclear what the timetable is for him returning to Cleveland. If they intend to use him as a starter again he’ll obviously need several more appearances to get stretched out. If he’s to be used as a reliever, fewer obviously. What his stamina level is and will be is also an open question.

However that gets sorted out, it’s good so have him back in action.