Somerset have announced Ty Proctor will take over as the Rebels' No 1 this season with Jason Doyle ruled out of their plans.
Doyle, who has fallen foul of visa regulations this winter, may still be able to ride in the UK this year via a temporary Tier 5 visa - but that could limit him to racing for just one club, which would be top-flight Leicester.
Somerset promoter Debbie Hancock said: "Jason has qualified, by virtue of his second place finish in the recent Australian Championships, for the Grand Prix qualifying meetings in 2014.
"That could ultimately see him lining up in the World Championship GP Series in 2015.
"It was felt that in order to give him the best chance possible to do this, he should be pitting himself on a consistent basis against top quality opposition and to do this he needs to be riding in the Elite League.
"Having looked at the riders that were possible options for us, the main consideration was the fact Ty would be missing the least number of matches due to any fixture clashes between ourselves and Wolves.
"That would help us to maintain a consistent line-up and not having to rely on using guest riders on too many occasions."