Glenn Poole should be fit for Barnet's trip to Morecambe.
The winger has been receiving treatment for a thigh injury all week but returned to training on Thursday.
The Bees are still awaiting the results of a scan on the ankle injury suffered by defender Daniel Leach last weekend.
Leach left Underhill on crutches following the 4-1 defeat by Rotherham and is not expected to figure at the Globe Arena, with Clovis Kamdjo his likely replacement.
Striker Chris Taylor has shaken off a groin problem and is in contention but centre-half Daniel Dennehy remains sidelined by a foot injury.
Charlie Stimson hit a hat-trick for the reserves in midweek to push his claims for a place.