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I would say no ... might be tight on the 15" dimension ... looks like it holds a lot of stuff though
 
Get the measurements of the bags and compare it to the MBP dimensions.

Backpack

Main Compartment: 18"(H) x 9.5"(W) x 4.75"(D)

15" MBP

Width: 14.35 inches (36.4 cm)

Depth: 9.82 inches (24.9 cm)

Should be able to squeeze 9.82" into 9.5" don't you think?
 
Backpack

Main Compartment: 18"(H) x 9.5"(W) x 4.75"(D)

15" MBP

Width: 14.35 inches (36.4 cm)

Depth: 9.82 inches (24.9 cm)

Should be able to squeeze 9.82" into 9.5" don't you think?

Depends on how thick that pocket is. If the bag is not too stiff, some "depth" can be translated in width.
 
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