BOSTON – David Ortiz, swinging on a 3-0 pitch, had a tying RBI single to trigger a five-run seventh inning, and the Red Sox avoided a three-game sweep by beating the Seattle Mariners 8-4 on Sunday.

“It’s nice to see David feel good about himself, where he feels good enough to commit like that,” Boston manager Terry Francona said.

Ortiz, who was hitting just .185 with just one homer at the end of May, also hit a solo homer Sunday. He’s hit safely in 24 of his last 29 games and raised his average to .225.

“That was a big hit for us,” said Dustin Pedroia, who w...

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