Aaron Parker won the Arizona Fall League Home Run Derby on Saturday night. The Blue Jays prospect wasn't even supposed to be in the field.

He was a last-minute replacement for Dodgers infielder Chase Harlan. “Got the call at 10:30 last night. Thankfully, I was up, and it was a no-brainer,” Parker said.

Entering as the No. 7 seed, he opened by knocking off second-seeded Alex McCoy. He launched 12 homers across the first two rounds to McCoy's seven.

The semifinal was the turning point. Down to his last out, he hit three straight homers to finish with five and eliminate Royals prospect Brooks Bryan.

The final was quick. He needed just three swings to hit the two homers required to beat Cardinals utility man Tai Peete.

He sealed it with a 477-foot blast to left-centre, with Blue Jays minor-league hitting coach Jacob Caples on the mound. Teammates greeted him with a water shower.

Aaron Parker's power is forcing the Blue Jays to find him a position

Is this just a fun night, or a sign of something more? The numbers say more.

The 5-foot-7 slugger hit 19 homers in just 87 games at Double-A New Hampshire. That tied him for third among all Toronto prospects.

He's been just as good in the AFL, posting a .994 OPS with 13 RBIs over 12 games.

“I swing as hard as I can every time I step into the box,” he said after the win.

Drafted as a catcher in the sixth round in 2024, he's been learning left field this fall. Alejandro Kirk and Brandon Valenzuela block his path behind the plate.

The Jays need to find a spot for this bat, fast. A team that finished last in homers can't let a prospect with this kind of power sit behind two established catchers.

Parker is like a sports car parked in a garage full of SUVs. It doesn't fit the space, so you make room.

He'll play in Sunday night's Fall Stars Game alongside Jake Bloss and Jake Cook. If the outfield move sticks, Ross Atkins may have found a power bat without spending a dime.