TAMPA — The Bucs placed former USF CB Mike Jenkins on injured reserve Wednesday, ending his first season with Tampa Bay after one game because of a pectoral injury suffered in the fourth quarter of Sunday's loss to Carolina."Our starters are both still there, and we'll keep developing the backups," coach Lovie Smith said.Jenkins' injury leaves the Bucs with only two proven corners in Alterraun Verner and Johnthan Banks. The only backups are second-year pro Rashaan Melvin, who has never played in an NFL game, rookie Brandon Dixon, who made his debut on special teams Sunday, and newly signed Crezdon Butler, who joined the team Wednesday but has only eight career tackles in four NFL seasons."Crezdon Butler is a corner that's played in the league for a while," Smith said. "With Mike going down, of course, we needed some help at that position."INJURY UPDATES: G Logan Mankins (knee), RB Doug Martin (knee), DE Michael Johnson (ankle), TE Austin Seferian-Jenkins (ankle) and Melvin (ankle) were all held out of practice with injuries.Seferian-Jenkins wore a walking boot on his right foot in the locker room and during practice. "Austin Seferian-Jenkins is getting better ..." Smith said. "We'll kind of see how it plays out for him."Smith didn't provide much information on the other injured players and said it was too early to tell whether any of them would be ready for St. Louis. He said Mankins is improving after leaving with a left knee injury in the second quarter. Johnson was hampered by an injured ankle on the game's third play, and defensive coordinator Leslie Frazier said Johnson had been in a walking boot this week.Limited participants were OT Demar Dotson (hamstring), DE Adrian Clayborn (elbow), DE William Gholston (shoulder) and S Bradley McDougald (knee).DL Da'Quan Bowers (abdomen) participated fully after missing the Panthers game.TEDFORD EXCUSED: Offensive coordinator Jeff Tedford missed practice to meet with doctors to get final medical clearance before returning full time. He had a heart procedure last month and watched Sunday's game from the press box to give coaches an extra set of eyes. He was back in the office Monday, and Smith said the former Cal head coach could be ready to call plays this week.ALL-PRO COMPARISON: Rams All-Pro DE Robert Quinn thinks highly of rookie DT Aaron Donald; he likened his play to that of Bucs star Gerald McCoy. "He's shifty," Quinn said of the No. 13 overall pick out of Pitt. "He's a very quick defensive tackle. He's not the typical 6-4, 6-5, 330. He's definitely one of the faster ones that can get into the backfield."STOP THE RUN: The Rams struggled in their opening 34-6 loss to Minnesota. Only six teams rushed for fewer yards than St. Louis (72). The Bucs have some familiarity with the Rams after a 23-13 road loss in St. Louis in December, and McCoy said last week's game isn't a good judge of the Rams' talent. "People, please, don't base the Rams off last week's performance," he said. "They can run the ball, and they can run it well."THIS AND THAT: McCoy's message to fans after a Week 1 loss: "Fans, don't crucify me for this: Just hang in there." … For the second week in a row, opposing injuries mean the Bucs aren't sure who they will face at quarterback. Frazier said they're preparing as if they'll face 13-year veteran Shaun Hill (thigh), who didn't practice Wednesday.Contact Matt Baker at [email protected] Follow @MBakerTBTimes. Contact Greg Auman at [email protected] and (813) 226-3346. Follow @gregauman.