June 2: Tampa Bay announced that Heasley has been diagnosed with a stress reaction in his right elbow, which he evidently suffered while on the big league roster. As a result, his outright was rescinded and he has been placed on the MLB 15-day injured list with an effective date of May 29. That will return him to the 40-man roster, which already had a vacancy after Andrew Wantz was designated for assignment over the weekend.

May 30: Right-hander Jon Heasley has cleared waivers and been outrighted to the Rays’ Triple-A affiliate.  (Marc Topkin of the Tampa Bay Times reported the move shortly before the team’s official announcement.)  Heasley isn’t able to decline the outright assignment, so he’ll return to Durham and await his next selection to the active roster.

The Rays signed Heasley to a minor league deal in April and then selected him to their 26-man roster just three days ago.  Heasley pitched the final four innings of the Rays’ 11-2 loss to the Orioles on Wednesday, allowing five runs on eight hits, including a pair of home runs.  Tampa Bay then designated Heasley for assignment yesterday, and the right-hander made a quick trip through waivers.

Though Wednesday’s outing was far from memorable, it did mark Heasley’s first MLB game in almost exactly two years.  Ironically, Heasley’s last appearance was with the Orioles back on May 23, 2024, and that unsuccessful stint saw him post a 16.88 ERA across four games and 5 1/3 innings of work.

A 13th-round pick for Kansas City in the 2018 draft, most of Heasley’s pro career has been spent in the Royals organization, apart from the 2024 season in Baltimore and his current stint in Tampa.  Heasley has exhibited good control but only intermittent strikeout ability even in the minors, and his career ERA now stands at 6.04 over 143 frames with the Rays, Orioles, and Royals.  Big league batters have taken Heasley yard a stunning 31 times in that relatively brief 143-inning sample size.