Mathurin was ejected from Tuesday's game against the Cavaliers after being assessed his second technical foul, Tony East of WTHR Channel 13 Indianapolis reports.
Walker notched 11 points (4-8 FG, 1-4 3Pt, 2-2 FT), five rebounds, one assist and one block over 18 minutes during Tuesday's 127-117 loss to the Cavaliers.
Vassell recorded 23 points (9-18 FG, 5-9 3Pt), six rebounds, four assists and two steals across 34 minutes during Monday's 126-102 win over the Lakers.
Accor Arena hosts Spurs vs. Pacers
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