Huddersfield striker Alan Lee will play no part due to suspension.
Lee has accrued five yellow cards this season and sits out an automatic one-game ban, so Lee Novak is expected to return to the starting line-up alongside leading goalscorer Jordan Rhodes.
Midfielder Oscar Gobern, who has played no part in the last five matches, is rated 50/50 due to an ankle injury sustained in training.
Goalkeeper Alex Smithies remains a long-term absentee following knee surgery, so Ian Bennett will continue, but Clark is not expected to make any unforced changes.
Central defender Jamie McCombe is struggling to force his way back into Clark's plans following suspension, but is hoping to return to the squad.
The Terriers are bidding to extend their unbeaten league run to 42 matches.
Walsall will be without midfielder Kevan Hurst, goalkeeper Jimmy Walker and defender Darryl Westlake.
Hurst faces at least five weeks on the sidelines with a broken bone in his foot which forced him off at half-time during last Saturday's 2-0 home reverse to MK Dons.
Walker was dismissed in the 33rd minute of the defeat having handled the ball outside of the penalty area and now serves a one-match suspension.
With no goalkeeper on the substitutes' bench right-back Lee Beevers was forced to go in goal for the remainder of the encounter, but David Grof will come back in.
Defender Darryl Westlake, who did not feature last weekend, is ruled out having turned his ankle, but midfielder Adam Chambers is back in full training and hoping to be involved having missed the last two games with a thigh problem.
The Saddlers, with one win in their last 11 league games, face an uphill task against a Huddersfield side who will equal an all-time Football League record of 42 matches unbeaten should they win or draw this weekend.
