The former Frickley man limped out of the 2-2 draw at Spennymoor on Easter Monday with what is suspected to be a torn quad.
He is one of many Boro playerstruck down with injury ahead of Saturday’s home game against Witton Albion.
Assistant-manager Chris Bodler said: “That could be the last time we see Matty this season, which isn’t great news for us.
“It is a case of assessing where we are with a lot of players when we get to training at the end of the week.
“Ryan Blott was rested on Saturday because of an ankle injury, Nathan Peat was rested on Monday.
“Steve Mallory has been soldiering on for weeks now, but he just tends to get on with it.
“Paul Robson had a sore groin on Monday, but again he just wants to play in any game he can.”
These injury issues could open the door for penalty king Joe Lamplough, who has impressed from the bench in recent weeks.
Lamplough notched a late leveller from the spot at Spennymoor and also bagged the winning penalty when Boro beat Ilkeston in the Doodson Sports Trophy semi-final.
Bolder added: “Lampy has done well, he is a good footballer with a good attitude.
“Given the fact that he hasn’t been playing a lot of football he could have let his head go down, but he has dug in and battled to secure his place in the starting 11.”
Boro’s only defeat in recent weeks came at Witton a fortnight ago, when a last-minute penalty gave the Cheshire side all three points.
Bolder is confident that they will be able to address that defeat at the weekend.
He said: “We are in a good run of form with just one defeat in our last nine games.
“The results are pleasing and so is the fact that we have picked up points against a variety of different teams.
“We felt we had enough against Witton last time out, but a last-minute penalty gave them the win.
“In the first half of that game we struggled to cope against their system, but we changed it around and that brought us right back into the game.
“We have shown that we can play a 4-4-2, a 4-3-3-and a diamond formation, which gives us plenty of options in games.”