The Giants have designated left-hander Ryan Borucki for assignment and selected the contract of outfielder Jonah Cox from Double-A Richmond, according to the San Francisco Chronicle’s Susan Slusser.  Outfielder Will Brennan has also been optioned to Triple-A, with righty Tristan Beck recalled in his place.

After being cut by the White Sox near the end of Spring Training, Borucki quickly caught on with the Giants on a big league contract.  The results haven’t been there for Borucki in his ninth MLB season, as the southpaw has a 4.94 ERA, 14.4% strikeout rate, and 8.7% walk rate across 23 2/3 relief innings.  Just when it seemed like Borucki was getting on track after a shaky start to the season, he gave up five earned runs over his last three outings and 5 1/3 innings of work.

As usual, Borucki has drastic splits, as left-handed batters have only a .550 OPS against him this season (while righty batters have a whopping 1.085 OPS).  A team in need of southpaw relief help could be inclined to claim Borucki off San Francisco’s waiver wire, but the likelier scenario is that he’ll clear waivers and then be outrighted to Triple-A.  Borucki has been outrighted in the past, so he can elect free agency rather than accept that assignment.

The 24-year-old Cox will be making his Major League debut whenever he appears in a game, and Cox will get his first taste of the Show before even getting a look at the Triple-A level.  It seems like Cox’s superb performance in Richmond couldn’t be ignored, as Cox is hitting .400/.453/.644 with six home runs and 27 steals (in 34 attempts) over 183 Double-A plate appearances.

Cox has never posted anything close to these numbers in his previous three minor league seasons, and he is surely getting a lot of help from an eye-opening .464 BABIP.  That said, Cox’s elite speed has helped him generate large BABIPs in the past, and he has drastically cut back on his strikeout rate to 16.9% in Double-A ball.

The bat has been the only question mark about Cox’s game, as his defense and speed were already seen as ready for primetime.  Those plus skills alone make Cox a viable bench piece for the Giants and perhaps a platoon partner for Drew Gilbert in center field, even if there’s bound to be a learning curve as Cox makes the big jump from facing Double-A pitching to big league arms.  The Giants rank last in baseball in stolen bases, so Cox should provide an immediate boost on the basepaths.

Baseball America ranks Cox 21st on their list of Giants prospects.  Cox was a sixth-round pick for the Athletics in the 2023 draft, and he was dealt to San Francisco in the February 2024 trade that sent Ross Stripling to the A’s.