Luckless Richmond midfielder Mark Coughlan has suffered yet another injury setback.

Coughlan, 26, finally returned to the Tigers' VFL affiliate Coburg last weekend after recovering from hamstring soreness associated with two knee reconstructions in the previous two seasons.

Coughlan successfully finished Saturday's big win over Collingwood's VFL side, only to experience more hamstring soreness during training on Wednesday.

He is expected to be sidelined for several more weeks.

"The club will continue to investigate all possible methods of rehabilitation to help Mark return to senior football," Richmond said in a statement.

Injuries have restricted the talented Coughlan to just 83 games for the Tigers since making his debut in 2001.

He won the club's best and fairest award in 2003.

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