As of August 2022, the 1990-91 season is the only occasion his domestic side Haryana won India's national cricket championship, the Ranji Trophy, that too beating a highly formidable Mumbai team in the finals, with Kapil taking key 3 wickets in Mumbai's first innings, securing a lead of 112 and scoring a quickfire 41 in Haryana's second innings to help set a fourth innings target of 355 for Mumbai, which they eventually failed to chase. Kapil also scored a century against an equally potent Bengal team in Haryana's semi-final triumph.
