Leaf recorded two points (1-1 FG) and one steal in Tuesday's win over Indiana.
Leaf signed a two-way contract with the Trail Blazers on Monday, Adrian Wojnarowski of ESPN reports.
Leaf was waived by the Thunder on Saturday, Sportando.com reports.
Leaf was traded from the Pacers to the Thunder on Sunday in exchange for Jalen Lecque, Adrian Wojnarowski of ESPN reports.
Leaf posted four points (1-9 FG, 0-1 3Pt, 2-2 FT), 11 rebounds and two assists in 17 minutes during Thursday's 91-88 scrimmage victory over the Blazers.
Leaf saw three minutes during Wednesday's 119-100 loss to the Bucks.
Leaf (illness) isn't on the injury report ahead of Friday's game against Toronto.
Leaf is listed as questionable for Wednesday's game against the Raptors due to an illness.
Leaf (knee) has been cleared to play Sunday against Portland, J. Michael of the Indy Star reports.
Leaf (knee) will be a game-time decision for Sunday's matchup against the Trail Blazers, J. Michael of The Indianapolis Star reports.