Leigh Griffiths is "drifting into obscurity" as he fears his old team-mate's career is on the slide. The Celtic striker has barely featured this season, managing just seven league starts.
Though he's scored five Premiership goals the Scotland international has been limited to cameo roles since being hooked at half-time in a loss to St Mirren in January.
And former team-mate Commons fears time could be up for Griffiths at Parkhead. He wrote in his Daily Mail column: "Leigh Griffiths is 30 just now.
But, rather than firing on all cylinders, it feels like his Celtic career is just being left to fizzle out. "He has scored five goals in 18 appearances in the Premiership this season.
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