Seager (back) started at shortstop and went 1-for-2 for Double-A Frisco on Tuesday.
Seager played three innings before being removed. In addition to getting on base, he had a few opportunities in the field to begin his rehab assignment. Rangers manager Skip Schumaker described it as a "really good day" for Seager, per Joe Harris and Theo DeRosa of MLB.com. Seager has been on the 10-day injured list since May 18 with lower-back inflammation.