The left-handed Pant, who kept wickets for Delhi for almost two days during Maharashtra's massive first innings total of 635 for 2 declared, came in to bat when his side was in trouble at 135 for 3 and remained unconquered in a close of play tally of 376 for 5.
Pant, who had represented the country in the last Under 19 World Cup in Bangladesh, batted in an aggressive fashion to strike 6 sixes and 21 fours off the 165 balls he faced till stumps on day three of the four-day match at the Wankhede Stadium.
Delhi were 51 for two before the innings was steadied by an 84-run partnership between Shorey, who struck 7 fours in 158 balls, and Nitish Rana (44).
Maharashtra pegged Delhi back a bit in the last over to stumps with the second new ball as Mohsin Sayyed, easily the team's most impressive bowler, sent back Kumar caught behind to end the fifth wicket partnership.
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For Maharashtra, Sayyed, who should have had Kumar caught by wicket keeper More when the batsman was on 4 in a Delhi score of 266 for 4 - returned with good end of day figures of 3 for 73, including that of rival captain and opener Unmukt Chand for 24.
The more experienced Shrikant Mundhe and off spinner Chirag Khurana picked up the other two wickets to fall.
Brief scores:
Delhi: 376 for 5 (Dhruv Shorey 71, Nitish Rana 44, Rishabh Pant not out 155, Milind Kumar 45; Mohsin Sayyed 3n for 73).