It depends on sport in question. Spoon mentioned that they'd have an adventage in light athletics, but in most martial arts or boxing almost a human would quickly win (the exception being those martial arts where strength matters little, in which case it'd only depend on the level of training). And of course, in pro wrestling, it'd depend on how the current storyline is supposed to play out (and I guess there'd be at least one wrestler/diva with "proud high elf" as his/her gimmick).
Regarding shooting, they'd most likely be better on small calibers, pneumatic and energy weapon competitions, but they'd be about equal with humans on larger caliber disciplines and skeet, due to higher recoil (I have fired a 12-gauge with a hefty powder load and an AK-47, among other weapons, so I know). On calibers like .50 BMG and mile-long ranges, they could even have a slight disadventage compared to a human shooter. I don't know about pistol shooting (having only fired a few of them, the largest one in 9mm), but I guess the pattern would be similar, and even more pronounced due to the fact recoil control is more difficult and requires more strength on handguns.
I was thinking about the contradiction, the idea that you can be a weakling and yet be highly athletic. How could that be? One way could be perhaps Cyrvans not having strong bones. They can have all the muscle they want, but their bones wouldn't be able to take much strain. It would also lighten their bodies, and maybe be the key to enabling the winged ones to fly, though I can't remember if they actually can fly or not, or even if it was mentioned.
Cyrvans playing football would be interesting. I imagine they'd run rings around humans, and put together complex tactics involving quick short passes of the ball and speeding past people. But they'd have trouble in the air being short and light, and have trouble shooting on goal being weak. The Cyrvan goalkeeper though would be extremely hard to score against. It might be in a very vague way be like playing Barcelona. But a faster, more athletic, but smaller and weaker Barcelona.
Cyrvans in the WWE? Hello, AJ Lee. She's as close a representation as you're going to get. She likes to cosplay video game characters too. So now we just need to get her some Cyrvan ears...
Cyrvans might not even be able to fire some larger weapons without injuring themselves. I once saw a video on youtube where some girl, maybe 11 or 12 years old fired a gun, can't remember what kind, but if you pause it, it the recoil pushes her shoulder into a sick position. And her Dad just laughs at her while she writhes around in pain too.