Rays farm director Mitch Lukevics confirmed Whitley's injury, noting, "He hurt himself diving for a ball."
The 13th overall pick in the 2015 Draft, Whitley played in a career-high 104 games last year, all with Class A Bowling Green, where he slashed .249/.362/.430 with 13 homers, 61 RBIs and 21 stolen bases. He also played in the Australian Baseball League this past winter, slashing .265/.384/.503 in 185 at-bats.
It was a bounce-back 2017 of sorts for the 21-year-old Whitley, who suffered a right hamstring injury that forced him to miss extended time in '16.
The Rays organization will already be without top prospect Brent Honeywell (No. 18 overall), who earlier this spring underwent Tommy John surgery on his right elbow.
Bill Chastain has covered the Rays for MLB.com since 2004.