The Chicago Cubs held on to top outfield prospect Owen Caissie at the trade deadline because they saw him as a key part of the team's future.

That future is now.

Caissie is getting called up to the big leagues after staying red hot in the minor leagues for most of the summer, according to ESPN's Jesse Rogers.

What we know:

It was only a matter of time for Caissie to make his big-league debut. He originally came to the Cubs as a key returning piece when Chicago dealt Yu Darvish to the San Diego Padres.

It's not currently known if he'll make his debut in Toronto on Thursday for the series finale with the Blue Jays.

Since the start of June, Caissie has been on a heater. He's recorded a .292 batting average and has hit 22 home runs for the Triple-A Iowa Cubs.

Caissie went 3-for-5 with a

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