Edwards, 35, was introduced with a little over 20 minutes to play with his side 1-0 down at Accrington Stanley, and played a role in Town's equaliser, notched from close range by Whalley.
The cameo sees the Pontesbury man join Whalley on clocking up two centuries of appearances in blue and amber.
Former Wolves star Edwards, who has hinted at hanging up his boots upon the end of his contract in the summer, reached his latest milestone in the second of two spells at his boyhood club. He has made 61 appearances, including 39 starts, since returning to Shrewsbury in January 2019.
His total includes games in the Shropshire Senior Cup and FA Trophy in his first spell, from his senior debut in May 2003 until leaving in 2007.
"I know I did it recently myself, but for Edo to make 200 appearances, it's a brilliant achievement, it's an incredible achievement," Whalley said of Edwards.
"It's one he should be proud of."
Steve Cotterill's side remained 17th and nine point clear of danger in League One with the valuable point in difficult, blustery conditions in Lancashire.
Edwards helped cause near-post confusion from Harry Chapman's corner for Whalley to convert for the leveller with 13 minutes remaining after Seamus Conneely's fine volleyed opener just after the break.
"I think everyone who watched the game might not have enjoyed it, it was just a big scrap and the pitch isn't the best, I'm not blaming Accrington, the weather's been terrible lately," top scorer Whalley said, after notching his sixth goal of the season.
"The wind killed the game. But we fought hard to get back in the game, I think either team could've nicked it towards the end.
"Accrington are a big set of lads, they are on a good run, it's going to be a hard place for anyone to come, but we did well to get back in the game.
"The corner came in, Edo got across the front, I don't think anyone touched it but I've just managed to get across the front and get my toe on it to poke it in, I was delighted.
"That's the big part of today (to stay unbeaten), we'd have liked to have won of course, but it's always hard to go a goal down – I know we won the last game from behind – but we've got to be happy with a point."