Towers has recently been watching the club's Double-A and Triple-A teams.
Injured reliever Sam Demel made his second rehab appearance for Triple-A Reno on Saturday night and could be close to returning.
"KT's been out and about and I think he's got some thoughts on his mind," Gibson said. "He's been to Mobile and Reno. We'll see what he wants to do."
Whether that means roster moves are on the horizon or not remains to be seen. While Demel may return soon, it sounds like he will make at least one more Minor League appearance.
"He's thrown two games in Reno and he's been off for over a month, so does that mean he's at full speed?" Gibson said. "I mean he's pitched in a couple of games, but is he ready to get used three out of four days? Probably not. I'd rather him get back at full speed, be strong and be fully prepared to do what we have to do with no limitations. We want to confirm that he's in fact strong and ready to go."