John Hartson thinks Celtic duo Stephen Welsh and Maik Nawrocki need to consider their futures at the club.
The pair have played a combined six games in green and white this campaign.
Despite an adequate performance against Rangers over a month ago, Nawrocki remains very much on the fringes of Brendan Rodgers' team. Meanwhile, Welsh finds himself on loan at KV Mechelen in Belgium's top flight.
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Hartson delivered his verdict on the latter, and the current wealth of competition at centre-back at Celtic: "Welsh, I think is up against it, because of some of the other centre-backs," he said [Go Radio].
"Trusty seems to be the one that’s out of the team, at the minute.
"Then, Scales is the one who has come back in. Sometimes, you can have a bad two or three games. Another player comes in, and he stays in for a while, then he has a bad game, and they change it again.
"But the good thing for Celtic is that they have two or three options for every position that they can mix the team up quite regularly.
“For me, the ones who are on the fringes, and aren’t playing every single weekend, don’t ever look like they are ever going to be regulars. You have got to look to move them on, not just for Celtic, but for their careers as well."
Then, quizzed directly on Nawrocki, Hartson took a similar stance: "He came in and I think he has played one game since that," he said.
“It’s about playing, being involved and making an impact on the team, in some way or another. If I am out in the cold. I want to go. Why would I want to stay somewhere where I am not playing every week?”
