Wednesday's visit marked the second time in five days that Bills general manager Buddy Nix and his staff spent time with Bowers. They met with Bowers after his on-campus workout Friday.
Bowers is working his way back from a December surgery to repair the lateral meniscus in his right knee, which he injured in October.
"I'm not sure that you would write him off if he's not completely healthy," Nix said. "But Friday was time for him to show he was either healthy or needed more work or more time."
Bowers (6-foot-3 3/8, 280 pounds) had 15.5 sacks last season and was the Atlantic Coast Conference Defensive Player of the Year. He visited the Denver Broncos earlier in the week and will see the Tennessee Titans, NFL.com senior writer Steve Wyche reported, before having his knee re-examined Saturday in Indianapolis.
"I think I can bring a lot of good things to a team," Bowers told the Bills' website. "You can get a pass-rushing defensive end, a humble guy, a guy with great character. A guy who is going to work hard, a guy that is going to go about things the right way, and a guy who is willing to compete with anyone anywhere."
The compete factor is one of the most impressive attributes of Watt, who led Wisconsin in sacks (seven), tackles for a loss (24), quarterback hurries (10), forced fumbles (three) and blocked kicks (three) last season. Unlike Bowers, who is primarily an edge rusher, Watt has the size (6-5½, 290), strength (34 bench-press reps) and explosiveness (37-inch vertical jump and 10-foot broad jump) to play end in a 3-4 or 4-3 defense.
"I think I'm tenacious and relentless defender," Watt told the Bills' website. "I'm never going to stop. I'm always going to be 110 mph on the field because I feel that's what the game deserves. I don't want to disrespect the game by taking a play off. That's just not how I play the game."