Ospreys and Wales hooker Richard Hibbard is expected to only be out for two weeks after injuring his knee against Glasgow.
Hibbard has been enjoying an impressive season for club and country, part of the Wales side that won the Six Nations title earlier this year.
The hooker was forced to leave the field after 18 minutes against Glasgow in the 35-17 defeat.
If his recovery goes smoothly, then the hooker could be in contention to play the final match of the regular RaboDirect Pro12 season for the Ospreys against Leinster.
Warren Gatland is due to announce the Lions squad on April 30.
"We'll be keeping a close eye on him over the next three to four days and will be in a better position to say more then," said an Ospreys statement.