If you're okay with sports then how about One Outs? It's about a guy who manipulate or use the power of psychology or something to bring a low rated baseball team to victory while also earning money. The man is also a gambler.

I don't know if this is what you're looking for, but I fell in love with it because of the psychological aspect of it, I guess, not the sport part.

Aphorism
Nowhere Boy
Zankoku na Kami ga Shihaisuru its a shounen ai so I don't know if you wnat to read it.
L∞P haven't read it but it sounds pretty interesting
Mozuya-san Gyakujousuru
Tsumitsuki
Alive
Blue Heaven
Battle Royale
Kanojo o Mamoru 51 no Houhou
Oni ni Itaru Doro
Sakura-Gari it's a yaoi though.
Shiro Ame
Watashitachi no Shiawase na Jikan

Remembrance, a forsaken thing that revokes ignorance and leaves people in doubt, is my only redemption and solace deep within the cascade of white.

The evergreen trees speak of days long past when music mingled with the wind and sweet murmurs brushed our cheeks.

try Bokura no Hentai. 😀