Gary Harkins' lack of work rate prompted departure from St Mirren
The midfielder has joined Lee Johnson's Oldham Athletic on loan.
Danny Lennon says Gary Harkins wasn't working hard enough off the ball to succeed at St Mirren with the midfielder poised to join Oldham on loan.
The 29-year-old joined the Buddies in the summer after his departing Dundee following their relegation from Scotland's top flight.
But after scoring twice in 17 appearances, Harkins is returning to England after spells with Blackpool, Grimsby, Blackburn and Bury earlier in his career.
Harkins has changed clubs in each of the last three transfer windows and the playmaker is ready to join up with former Kilmarnock team-mate Lee Johnson.
The player could make his debut against Liverpool in the FA Cup and Lennon explained he couldn't promise Harkins first-team football.
Lennon said: "Things are never guaranteed to work out but Gary was a top bloke and I didn't get one bit of bother from him.
"He has fantastic ability and I can understand why he wants to go out on loan to play. But the way we are shaped up at this moment we can't guarantee that.
"He can create things and open doors but we need guys who will be compact and put everything in. I would have liked to have seen him work a little bit harder out of possession.
"I thought when he came here we could have changed that ever so slightly but it hasn't worked out as well as we had hoped for."