For Ottawa, quarterback Trevor Harris managed 457 passing yards and two touchdowns, but he couldn't get the Redblacks offence out of first gear - despite making a CFL playoff record 60 pass attempts - as the home team's hopes of a long playoff run culminating in a Grey Cup in the friendly confines of TD Place came crashing down.
Saskatchewan will take on the Argonauts in Toronto in the East Division final next Sunday.
The Grey Cup championship is set for November 26. But on the first play from scrimmage after the kick, Marcus Thigpen turned on the jets, scoring a 75 yard touchdown run.
Up north in the CFL playoffs, the Ottawa Redblacks outdid any National Football League team this season with a limbo celebration after a first-quarter touchdown by Diontae Spencer, who was the limbo stick after scoring. He's scheduled to become a free agent in February.
The slugfest continued, as Glenn plunged in for a touchdown from the one-yard line; Crapigna's convert gave the Riders a 14-8 lead. They earned the East's final playoff seed after amassing more points than the third-place Hamilton Tiger-Cats.
This time, Saskatchewan jumped out to a 21-8 lead after the first half.
Ottawa replied with a 29-yard field goal by Maher 8:04 of the third to reduce the Riders' lead to 28-14.
Thigpen cemented the win with his TD run on the next possession, putting Saskatchewan ahead 28-11 to the dismay of the TD Stadium sellout of 24,107.
Harris and co. responded on the second play of their first offensive drive, as the REDBLACKS pivot bombed a 56-yard pass to Diontae Spencer for a major; Harris then lofted a successful two-point convert to Juron Criner. Crapigna added the convert at 3:13 of the third quarter. Ottawa did score a late touchdown but it was too little too late.
Saskatchewan also forced two key turnovers.
The visitors opened the scoring on a methodical six-play touchdown drive capped by a 29-yard touchdown connection from Glenn to Bakari Grant.