Lehner, who started 11 of Vegas' 14 games this postseason, including five of six in this series, was the choice over Marc-Andre Fleury.
Lehner lost his last two starts, with a 2.56 GAA and .872 save percentage. Fleury last started in Game 4 on Sunday, making 28 saves in a 5-3 win, the second of a back-to-back.
"Whoever plays, plays," Lehner said. "If I get to play, I'll do my best like I always do. … If you play, just got to do your best."
Lehner is 7-4-0 with a 2.17 GAA, .914 save percentage and two shutouts in 11 postseason games. Fleury is 3-0-0 with a 2.67 GAA and .893 save percentage in three games.