TAMPA — Bucs rookie QB Mike Glennon hasn't been perceived as a mobile passer, but he surprised people Sunday when he broke loose up the middle for 16 yards on third and 14 during Sunday's loss to the Eagles."I think I've always been able to move enough in the pocket," Glennon said Wednesday. "I don't use my feet as a weapon. But when need be, I think I can get a few yards then get down, get the first down. I'm sure that won't happen too often, but I think I showed I can do it if the defense opens up."Glennon, whose career high at N.C. State was 15 yards, ran three times for 20 yards Sunday. His 16-yarder came three plays before he hit WR Vincent Jackson for a second-quarter touchdown.LT Donald Penn said he was impressed but gave Glennon some grief about his scrambling ability after the game."I was messing with him, said, 'Man, I didn't know you could run like that. I need to see you do that more often,' " Penn said. "It really, really puts the defense at a disadvantage when he does that. Every time he did run, the field was wide open. As an offensive line, we have to do a better job so he doesn't have to run. When he does, he did a great job; great job of getting down and not getting himself hit." MOMENT OF LEVITY: Glennon said he and coach Greg Schiano shared a laugh after his long run on the opposite sideline from former Oregon and current Eagles coach Chip Kelly ."Coach Schiano always gives me a hard time about not going to Rutgers," he said. "After that long run, there was a timeout. I came to the sideline, and he was kind of smiling. I just joked and said, 'Maybe I should have gone to Oregon instead.' " BEEN THERE: The Bucs have music blaring in practice to get ready for Sunday's game at the Falcons. Glennon will make his first road start in the Georgia Dome."It is loud. I'm sure it's going to be amped up a little bit," Glennon said. "That dome, it really keeps the sound in there."In his one game in the Georgia Dome, a 35-21 loss to Tennessee in last season's opener, Glennon committed six turnovers: a career-high interceptions, a fumble returned for a touchdown and a fumble recovered at the Wolfpack 3. For comparison, Glennon threw a total of three interceptions over his next six games. EYE IN THE SKY: The Bucs have scored just six offensive touchdowns (tied for last with the Jaguars) and none in the second half.Perhaps that's what prompted offensive coordinator Mike Sullivan to watch Sunday's 31-20 loss to the Eagles from a booth rather than the sideline."Two years in Jacksonville and then eight years with the Giants, I was always in the press box," said Sullivan, a receivers and quarterbacks coach for the Giants and an offensive assistant for the Jaguars. "We talked earlier in the bye week that everything was going to be analyzed in terms of our operation, terms of the players, the plays, the schemes, etc. And then game day, what are the ways we could be more efficient? "I know from all those years being up in the press box there's a perception and a vantage point you get that I felt would be beneficial."So who took Sullivan's place on the field?"Just switched with (quarterbacks coach) John McNulty ," Sullivan said."And I was relaying calls into him." ROSTER UPDATE: One day after placing CB Rashaan Melvin on injured reserve, the Bucs filled out their 53-man roster by promoting WR Skye Dawson from the practice squad.Dawson, 5 feet 9, 183 pounds, caught only six touchdowns in four seasons at TCU but was all-Big 12 honorable mention last year as a punt returner, averaging 9.4 yards with a long of 64. The Redskins signed him as an undrafted free agent and released him in August.The Bucs also tweaked their practice squad. They released OT Randy Richards and added S Nick Saenz , who was with the team in preseason camp, and former Boston College OT Emmett Cleary . INJURIES: CB Danny Gorrer (groin), who is on injured reserve but designated to return, can start practicing today. But he can't play in a game until Week 9 (Nov. 3 against Seattle). … RB Jeff Demps did not practice. He left Sunday's game with a groin injury. … WR Mike Williams , inactive Sunday with a hamstring injury, practiced with limited participation. Times staff writer Rick Stroud contributed to this report.