Lewis, 31, was released by the Indians earlier this month. He posted a .230/.321/.317 line in 210 plate appearances for the Reds last year, but he spent time on the disabled list with a strained right oblique muscle. Lewis played both corner outfield positions for Cincinnati, and he has a track record of success against right-handed pitching (.780 career OPS).
Emaus, 26, opened last season with the Mets as a Rule 5 Draft pick. He hit .162/.262/.162 in 42 plate appearances before being returned to the Blue Jays in mid-April. Toronto traded Emaus to the Rockies soon thereafter, and he went on to hit .313/.389/.564 in 186 plate appearances with Colorado's Triple-A affiliate.