The injury, a mild rear oblique strain, happened in the bottom of the ninth inning of Friday night's marathon game against Seattle on a checked swing. Scott went on to fly out in the at-bat, and as he left the batter's box, his back tightened up.
"It's a tough injury to try and play through," Scott said. "The way I felt coming out of the box and when I took that check swing, I knew something was up. As I went in the dugout, when I was moving around feeling it, it didn't feel good."
Scott previously spent time on the disabled list in mid-June because of a back strain, but said after Friday's game the newest injury was unrelated. Still, Scott is not pleased with how much time he's spent in the training room this season.
"This past year, I've been spending too much time there," Scott said. "But they've been doing a great job of trying to get me going and help me overcome these obstacles. There's still a lot of season left, and that's how I have to look at it."
He added that he doesn't think the injury will sideline him past the 15th day on the disabled list and hopes to do a rehab assignment before he's eligible to return.
Hideki Matsui will likely see more time in the lineup, and was listed as the DH on Saturday, batting sixth. He's struggled at the plate this season, batting just .156 with two homers and seven RBIs in 32 games.
Left-hander Cesar Ramos was called up from Triple-A Durham before Saturday's game to fill out the roster. He will provide more depth to a bullpen that pitched 6 1/3 innings in Friday's 14-inning game.
Rays manager Joe Maddon said another factor in calling up a pitcher was that Alex Cobb and Matt Moore take the mound in the weekend's games, and both starters have struggled at times to work deep into ballgames.
"We're short on the bench, but also, I think the bullpen has been getting kind of abused lately," Maddon said. "We needed to cover ourselves in the bullpen."
Ramos was last up with the big league club in June and has pitched 20 2/3 innings this season with a 1.74 ERA and 17 strikeouts.