The 27-year-old pitched 47.2 innings between the Double-A and Triple-A levels in the Orioles' organization last season, where he recorded a 5.85 ERA and a 49:23 K:BB prior to being released in July. Lee has yet to pitch in the majors, but he posted a 4.10 ERA and 32 strikeouts over 26.1 innings with St. Paul of the American Association last year.

The 26-year-old lefty has yet to pitch above the Triple-A level. He recorded a 5.91 ERA in 45.2 innings for Triple-A Norfolk this season.

Tuesday's appearance marked Lee's first of spring, as an illness kept the southpaw out of early action. The 26-year-old is expected to open the season back at Triple-A Norfolk, where he owns a combined 5.58 ERA, 1.81 WHIP and 91:64 K:BB across 127.1 innings (23 starts, nine relief appearances) over the last two seasons.

Lee is expected to return to the mound soon, which would give him still enough time to build up to game shape by Opening Day. The 26-year-old is unlikely to spend that day on the big-league roster, as he's yet to conquer the Triple-A level, posting a 5.58 ERA over parts of two seasons for Norfolk.