If all goes well, he would make a rehab start, probably with Triple-A Tacoma, and pending the outcome, could be on the Safeco Field mound on May 2 against the Rangers.
However, the decision regarding his appeal of a five-game suspension for throwing a pitch over D-Backs catcher Chris Snyder's head during a Spring Training game on March 15 still has not been reached.
Lee gave his side of the story last Wednesday.
The Mariners would probably activate Lee from the 15-day disabled list the same amount of days prior to his penciled-in start against the Rangers, which means Seattle could play as many as five games with a 24-man roster.
A suspended player must be on the active list to serve his penalty.