Pittsburgh Pirates starting pitcher Rob Zastryzny. Charles LeClaire-USA TODAY Sports

Lefty reliever Rob Zastryzny elected minor league free agency, per his transaction log at MLB.com. He cleared outright waivers after being designated for assignment by the Pirates earlier in the week.

Zastryzny pitched in 21 games for the Bucs this season. He tossed 20 2/3 innings, working to a 4.79 ERA in the largest workload of his big league career. While his fastball averaged a personal-high 93 mph, he struck out a well below-average 15.5% of batters faced. Zastryzny also walked opponents at a lofty 13.4% clip and spent a bit of time on the injured list with forearm inflammation.

The 31-year-old had better underlying numbers with the Bucs’ Triple-A team. His 4.41 ERA over 16 1/3 innings wasn’t far off his big league mark, but he had a solid 23.9% strikeout percentage while walking a microscopic 1.5% of batters faced. He kept the ball on the ground at a 45.8% clip.

Zastryzny has been outrighted a few times in his career, which gave him the right to test free agency. He wouldn’t be eligible for postseason play if he catches on with another club for the rest of the season. It wouldn’t be surprising if he turns his attention to a 2024 landing spot this late in the year.

More must-reads:

TODAY'S BEST
Mavericks advance to Western Conference Finals aided by controversial call late
Connor McDavid, Oilers hammer Canucks to force Game 7
Tyson Fury-Oleksandr Usyk epic increases excitement for potential rematch
Seize the Grey wins in muddy Preakness
Even Mike Budenholzer admits the Suns need a point guard
Watch: Juan Soto's first multi-homer game as a Yankee
Xander Schauffele, Collin Morikawa lead at PGA Championship
Knicks could get major boost for Game 7 showdown with Pacers
Giants All-Star pitcher suffers setback in recovery from injury
Panthers star named winner of 2024 Selke Trophy
WNBA to investigate $100,000 sponsorship deals for Aces players
Tiger Woods blames one big factor for missing the cut at PGA Championship
'Ain't good enough': Draymond Green claims Celtics must 'win it all' or it's a 'failure'
Blue Jays GM wants struggling club to feel 'massive sense of urgency'
Raptors expected to flip former NBA champion during the offseason
MLB insider reveals Mets' massive extension offer that Pete Alonso turned down
Celtics legend provides update after gruesome finger injury
Bulls hire former NBA head coach as top assistant
Chiefs move on from young running back
20-year MLB veteran working out, unsure about playing future