(Manuel Balce Ceneta/AP)

As he rounded first base following his eighth inning home run, left fielder Michael Morse felt something in his left hamstring, Nationals Manager Davey Johnson said. It was likely a spasm, he said, the first known leg injury for Morse this season. 

“Hopefully it was just a spasm,” Johnson said. “Might be a first if somebody pulled a hamstring on a home run.”

Morse will receive treatment and no tests, Johnson said. Following the game, as Johnson left the X-ray room for tests on his back, he noticed Morse getting treatment on his leg, “electrodes on there stimulating,” as he put it. Morse’s injury doesn’t appear serious, Johnson said.

It has been a trying season for the slugger, who missed the season’s first 50 games with a lat muscle strain and then has dealt with a bad bone bruise in his left wrist and a sore right hand. After missing four games because of his left wrist in mid-September, Morse has hit .326 (17 for 52) with five home runs and 13 RBI. With Wednesday’s home run, Morse finishes the regular season hitting .291/.321/.470 with 18 home runs and 62 RBI in 102 games.