PITTSBURGH — Sunday’s game between the Miami Marlins and Pittsburgh Pirates was cancelled more than four hours before its scheduled 1:35 p.m. ET start time because of heavy rain that was expected to continue into the evening.

The game was rescheduled for Oct. 1, the day after the regular season is scheduled to end. It was not immediately clear if the game will be played if it does not impact the postseason race.

The Pirates entered Sunday seven games out of the second NL wild card while the Marlins have already been eliminated.

The Pirates wound up sweeping the shortened two-game series and went 5-0 on a homestand that included three games against the Cincinnati Reds. The Marlins have lost three of four games.

Pittsburgh will play the rest of the season without right fielder Gregory Polanco, who has a bone bruise in his left knee. Polanco leads team with 21 home runs, 83 RBIs and 61 extra-base hits while batting .254 in 130 games.

Polanco was injured Friday night and left the Pirates’ 5-3 win over the Miami Marlins in the sixth inning when he slid awkwardly into second base on a double. He also strained his left shoulder.

In his last 17 games, Polanco hit .348.

“He had made great strides,” Pittsburgh manager Clint Hurdle said. “I really thought the improvement and the maturity -- and that’s the word I’ll continue to use -- he showed throughout the season, being an anchor in the lineup, continuing to work on his defense, stealing bases even in the month of September.”