Dennis Greene will be running the rule over a number of trialists in pre-season.
The Pilgrims manager says he has received plenty of interest from free agents hoping to force their way into his squad.
“I’ve had plenty of CVs come my way,” Greene said.
“It’s always something you look at in pre-season, you never know what good players you could discover.”
United’s squad will report back for training on Tuesday evening, with Zak Mills and Dayle Southwell, in particular, looking for fitness after shrugging off injuries.
United and Boston Town will meet in a pre-season friendly this summer.
The match - to be held at the DWB Stadium - will take place on Saturday, July 18.
The warm-up match will see new Poachers manager Mark Angel take on the club with which he won the Conference title in 2002.