The Pirates are monitoring players’ vital signs during games

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And calorie consumption and stuff like that. All via some cutting edge athletic technology. Or at least cutting edge for baseball. From Travis Sawchik of the Pittsburgh Tribune:

Prior to and during games this exhibition season, some Pirates are wearing Zephyr workload monitoring devices. Under select players’ jerseys is a tight-fitting, compression shirt, which has a black, circular, detachable electronic device — about the size of a quarter — attached near the center of the chest. The device collects data from a sensor that records players’ heartbeats and energy consumption. The device’s most noticeable features are blinking green and red lights.

Russell Martin talks about how he has used it to monitor how many calories he burns during games. It also measures heart rate. Neal Huntington speculates that there are other things it could tell the Pirates if they decide to go wider-scale with their use. For now it’s just an experiment.

I wonder if it could potentially measure telltale signs of fatigue. That could be pretty useful for pitchers, couldn’t it?

Report: Momentum in talks between Mariners, Jon Jay

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MLB.com’s Mark Feinsand reports that there is some momentum in talks between the Mariners and free agent outfielder Jon Jay.

Jay, 32, hit .296/.374/.375 in 433 plate appearances with the Cubs last season, which is adequate. He’s heralded more for his defense and his ability to play all three outfield spots.

The Mariners are losing center fielder Jarrod Dyson to free agency and likely don’t want to rely on Guillermo Heredia next season, hence the interest in Jay. The free agent class for center fielders is otherwise relatively weak.