Spencer notched 15 points (3-8 FG, 1-4 3Pt, 5-5 FT), five rebounds, three assists, one steal and one block in 22 minutes of Sunday's 127-104 loss to Mexico City.
Spencer agreed Wednesday with the Warriors on a two-way contract, Anthony Slater of The Athletic reports.
Spencer didn't play in Friday's win over the Ignite due to an injury or illness.
Spencer tallied 14 points (6-15 FG, 1-3 3Pt, 1-1 FT), 11 rebounds and six assists during Wednesday's loss to the Blue.
Spencer has been waived by the Warriors.
Spencer signed a non-guaranteed training camp contract with the Warriors on Monday, Keith Smith of Spotrac.com reports.