The Lakers signed Mays to a two-way deal Monday, Adrian Wojnarowski of ESPN reports.
The Trail Blazers waived Mays on Saturday.
Mays had zero points (0-8 FG, 0-4 3Pt), three rebounds and one steal over 14 minutes during Thursday's 118-105 loss to the Spurs.
Mays closed with six points (3-8 FG, 0-1 3Pt), 10 assists, five rebounds and two blocks across 31 minutes during Tuesday's 115-99 loss to the Jazz.
Mays posted 15 points (7-13 FG, 0-4 3Pt, 1-2 FT), 12 assists and four rebounds over 33 minutes during Sunday's 116-110 loss to the Lakers.
Mays had his two-way contract converted to a standard deal Saturday, Adrian Wojnarowski of ESPN reports.
Mays finished with 18 points (8-15 FG, 0-2 3Pt, 2-2 FT), two rebounds, 11 assists and two steals over 37 minutes during Wednesday's 121-118 overtime loss to the Kings.
Mays racked up seven points (2-9 FG, 1-5 3Pt, 2-2 FT), one rebound, two assists and two steals across 16 minutes during Sunday's 112-100 loss to the Grizzlies.
Mays accumulated 21 points (7-17 FG, 2-7 3Pt, 5-5 FT), four rebounds, 12 assists and three steals in 41 minutes during Sunday's 157-101 loss to Golden State.
Mays signed a rest-of-season contract with the Trail Blazers on Sunday.