Boston have completed the signings of Tim Ryan and Mark Albrighton.
Ryan has always been admired by Boston's manager
Central defender Albrighton, 30, joins from Doncaster Rovers while left-back Ryan, 31, was a free agent after rejecting a new deal at Peterborough.
Pilgrims manager Steve Evans told the club website: "Albrighton is an outstanding central defender who we are delighted to sign.
"I spoke to (manager) Dave Penney about both Mark and Tim and he gave both players the best references possible."
Ryan joined Peterborough from Doncaster in March, having had spells with Scunthorpe United, Altrincham and Southport earlier in his career.
Albrighton, who went on loan at Chester City this season, will undergo a medical later on Wednesday.
Evans added: "Tim is an excellent addition to our squad and he brings with him a wealth of experience.
"He was outstanding against us recently when he played for Peterborough and is a player that I've always admired."