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Koss matched fellow former Red Sox infield prospect Rafael Devers in leading the Giants today. The homers were his second and third of the year, bringing his career total to six in 345 plate appearances since debuting with San Francisco last year. He’ll continue starting for the Giants at least until another former Red Sox prospect, Marcelo Mayer, is ready to come off the IL.

Koss gets the call to join San Francisco’s injury-depleted infield mix with Matt Chapman finally requiring a trip to the injured list due to a lingering abdominal strain. The 28-year-old has gone 1-for-14 at the plate in the big leagues this season. He can be safely ignored in all fantasy leagues.

The Giants needed to clear a spot on their active roster for the return of Daniel Susac on Friday and it looks like Koss drew the short straw this time around. The 28-year-old infielder is just 1-for-14 (.071) in his limited action with the Giants this season.

Koss started the Giants’ three-run rally in the eighth inning by reaching on an infield single off of Blake Treinen. He then scored the tying run on Patrick Bailey’s RBI double. Koss also doubled in the ninth inning and advanced to third on a ground ball but the Giants couldn’t cash him in. On the season, the 27-year-old infielder is slashing .267/.305/.376 with three long balls and 22 RBI.

The game was scoreless until the 11th, as the D-backs couldn’t plate the winning run from third with one out in either the ninth or 10th. Jerar Encarnacion had the go-ahead single in the 11th, and Koss followed with the double to make it 3-0. He also had a two-run double in his previous start Monday. He’s been a solid part-timer for the Giants with his .258/.298/.365 line and very good defense at second base.