Montreal Impact are running the rule over USA international Heath Pearce after had hip surgery last year.
Pearce has been with the Impact since Wednesday and will undergo a 10-day trial spell as he looks to prove his fitness to the coaching staff.
"He looks fine, 100 percent," Biello told MLSsoccer.com from the Canadian clubs preseason training camp in Orlando.
"He trained normally. We'll see how he responds in the coming days. I think he's recovered, and he wouldn't be here if he were injured.
"When you're on trial, you're at 100 percent, you want to show that you've healed. He was fine at training today. We hope that he'll find some form with a few training sessions, and we'll see how he does in a game situation.
"[The staff] discussed and decided to see how he was, and if he shows us certain things, it could help us in terms of experience and stability at the back."
The Impact are currently competing in the Walt Disney World Soccer Pro Classic where they defeated Brazilian club Fluminense 1-0 on Wednesday.
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