KingD19
Shai-Gen's Enigmatic Wong
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Nope, watch the vid. He's basically even and even a little better than Logan. Logan just took him by surprise because he chopped his staff in half. And his higher agility/speed, helped him a great deal as the video showed. And Wolverine only caught him because he chopped the fire escape down and he couldn't catch his balance.
The thing about explosives is that they're pretty much omni-directional. You toss a hand grenade on the ground, and it blows up 360. So Gambit's cards hit the ground behind or around Cap, and his shield won't block those. He could even do his ground explosion if he felt like it; that'd knock Cap a good 10-20 feet.
As for Logan knocking him down(not out), Logan TKO'd Blob with an elbow. And Blob is the guy who fisted a tank barrel and was unharmed when it tried to shoot him.
And Cap as good as he is has never fought anyone but cannon fodder, and while he has strength/durability feats out the wazoo, he doesn't have many combat speed feats either. Movement speed is another story.