The Costa Rica international is yet to seal a work permit to allow him to play in England.
Fellow midfielder Jacob Mellis is also out for Riga, whose side has lost all six games played so far this season in all competitions.
Meanwhile, Wolves have no new injury worries with boss Kenny Jackett picking from a fully-fit squad.
The Molineux outfit signed George Swan until Christmas after his release from Manchester City but the defender, who turned 20 on Friday, will not be considered for the first team yet.
Jackett won the Championship Manager of the Month award for August, with Wolves able to go top if Watford fail to win at Charlton Athletic.
Blackpool: Lewis, McMahon, Daniels, Clarke, J Oriol, Perkins, Lundstram, E Oriol, Orlandi, Delfouneso, Ranger
Subs: Parish, Rentmeister, Dielna, Cywka, Zoko, Zenjov, Miller
Wolverhampton Wanderers: Ikeme, Doherty, Batth, Stearman, Golbourne, McDonald, Saville, Van La Parra, Edwards, Jacobs, Dicko
Subs: McCarey, Henry, Clarke, Sako, Evans, Ricketts, Ebanks-Landell