The deal is pending a physical, the source said.
Gibson, a 32-year-old right-hander, went 13-7 with 160 strikeouts for the Minnesota Twins in 2019, but he faltered down the stretch as he dealt with the effects of ulcerative colitis. Gibson’s ERA ballooned to 4.73 after giving up 26 earned runs in his final six starts before he was relegated to the bullpen on Sept. 15.
His struggles continued as a reliever in September, and he gave up three runs in one inning in his only postseason appearance — a 10-4 loss to the New York Yankees in Game 1 of the American League Division Series.
Gibson, who relies on his slider for his out pitch, has provided quality innings for…