Colchester United have signed striker Wayne Andrews from Oldham and midfielder Phil Hadland, who spent last season on a month to month deal at Darlington.
Parkinson unable to persuade Tony Carss to link up with Andrews
Andrews, who has agreed a two-year contract, scored 11 goals from 28 starts for Oldham last season after being plucked from non-league football by manager Iain Dowie.
Hadland has signed a one year contract.
U's manager Parkinson told BBC Essex: "I was at Reading with Phil Hadland. He's drifted around a bit since then and I feel he deserves a year with us to prove himself.
"I needed someone else in the squad with pace who can get behind teams. In terms of money it isn't a big deal but it's a chance for Phil to carve a career in professional football."
Meanwhile Parkinson has revealed Oldham midfielder Tony Carss turned down the chance of a move to Layer Road to link up with Andrews.
Parkinson has been tracking Carss as well as Andrews over the past few weeks.
"We made Tony an offer earlier in the summer and he has been considering it over the past few weeks," Parkinson
told the club's website.
"However he has decided he doesn't want to relocate and will be staying in the North-West."