ARLINGTON -- Rangers outfielder Josh Hamilton missed Sunday's finale against the Rays with soreness in his right knee.
Hamilton received a cortisone injection after Saturday's 6-1 win and took the day off to see how it feels. Rangers manager Ron Washington and Hamilton both expect him to play in Monday's opener against the Mariners.
"They said sometimes the fatty pad in your knee can get pinched and get inflamed," Hamilton said. "It's nothing that's so painful that I can't play with it.
"But it's given out a little bit. It was a good time to get it taken care of."
Washington said he isn't worried about the knee, which Hamilton said has been sore for about a month.
"No level of concern. He's been playing with that knee for quite a while," Washington said. "It's time we take care of it. That's all. He's playing tomorrow. He's pinch-hitting [Sunday] if I need him."
Hamilton homered in Saturday's win, and heading into Sunday's game, he was 10-for-22 this month, raising his batting average by 18 points to .299.
"He's been feeling it for a while," Washington said. "That could be some of the reason why you see him running after balls and falling down in the outfield. But Josh is turning a corner as far as how to gut things out. But at times, we've got to step in and help him."