The injury is enough to keep Collins out of the game in San Marino so he's been sent home to return to his club.
With Morgan and Steve Evans in the squad Johack has decided against calling up another player.
Wales squad to play San Marino on October 17 in Euro 2008 Qualifying Group D:
Goalkeepers: Coyne (Tranmere), Price (Derby)
Defenders: Bale (Tottenham), Eardley (Oldham), S. Evans (Wrexham), Gabbidon (West Ham), Morgan (Peterborough), Nyatanga (Barnsley), Ricketts (Hull)
Midfielders: Crofts (Gillingham), S. Davies (Fulham), Fletcher (Crystal Palace), M. Jones (Wrexham), Ledley (Cardiff), Robinson (Toronto), Vaughan (Real Sociedad)
Forwards: Bellamy (West Ham), Earnshaw (Derby), Easter (Wycombe), Eastwood (Wolves)