[...] Except there are no capture points. It's literally a sport. A neutral ball, called the JACK, spawns near the center of the map. Players must take the ball and successfully score it in one of the opposing team's goals. By default, the scoring limit is five; the team that first reaches this limit wins. Otherwise, the team with the most points wins when time runs out. https://wiki.teamfortress.com/wiki/PASS_Time#Gameplay You get the ONE JACK, and run it down to the enemy's side, either scoring in the throwing net, running into the end zone, or with a power JACK goal.

[...] Then it would just resemble a 3CP. You can hold with the Jack on mid and you can setup on last with sentries and offclasses to prevent it from being capped, and you play it just like a 5cp

[...] you would think that, if there was more than one J.A.C.K. There's only one ball in passtime, making it a constant change for who's attacking and who's defending

Maps (or just one map) that I've played Passtime in are awful. It is basically sniper's heaven.

https://www.teamfortress.tv/49301/pass-arena2

I can't really imagine pass time being that competitive though because of how weird the objective and the means to get the objective are. It's too inconsistent and too chaotic to be able played in a proper competitive level. It'd be like CTF, some would have to guard the Intel (PASS BALL) and some would have to go and get it, and if you push with your entire team the enemy team might as well just mirror you and get your ball as well. Way too chaotic to work, imho.