Remaining a game ahead of Bristol for the West Division’s top spot, the Cardinals (29-27) broke a 1-1 tie with a three-run fifth inning. Chandler Redmond’s RBI single put the road team ahead before Zach Jackson and Kevin Vargas drew bases-loaded walks.
Robbins (2-0), who allowed an unearned run over 2 2/3 innings, benefited from that small outburst. He took over for starter Luis Ortiz with two outs in the fifth inning.
Recording the final five Burlington outs, Witkowski struck out four batters in notching his third save of the year.
Leadoff man William Jimenez accounted for two of the Cardinals’ seven hits while Carlos Soler went 1 for 2 and drew a pair of walks.
The Indians (34-23) finished with five hits.