Lyles will start Wednesday's exhibition game against the Rockies, T.R. Sullivan of MLB.com reports.
Lyles, who had a shaky start to summer camp, is coming off his best outing. He pitched in an intrasquad game Friday and allowed two runs on three hits and four walks while striking out six over six innings. The Rangers are expected to skip Lyles' first regular-season turn in the rotation, and it's possible they also forgo him a second time, as they have three off days during the first 11 days of the season.