Ball is often not in range of brig heals. Ball works somewhat decently with Zen yes, but also Ana because he can reliably give her massive ult charge if she can aim and isn’t being pressured.
Tracer can constantly chase the ball. If you have a 200hp hitscan with a pocket like an Ashe, the balls going to struggle focusing one down more with his peashooter gun. If you’re playing Widow you’re just asking for it, if you’re on Ashe you can coach gun the ball away. Torb is unironically great as you can keep constant tabs on the ball every time he goes by the turret. Ball struggles heavily with Soldier 76 if they’re decent even in a 1v1. The Soldier will outlast the ball in a 1v1 due to his healing. Echo and Pharah should win with a pocket easily. Mei isn’t as potent as she should be but can box hammond in depending on the map. McCree, flashbang FTH spam when balls close, you do more damage at range.
DVa is going to struggle until Sigma is less able to outclass her and she may need some small buffs. Dev’s probably shouldn’t have just added everything in tanks into a blender and hit frappe. Monkey is in need of buffs, but careful ones.
Rein and Winston are the only tanks that should have a consistent loss in a sorta 1v1ish scenario. Hammond can just distance himself from Rein and Rein needs to drop his shield to do damage. Winston just has a lower TTK than Hammond.
As for supports,
Ana does surprisingly well against Ball. You have the kits to survive a 1v1 handily and a small hitbox + his lack of ammunition makes it doable.
Brig, does anything need to be said here?
Bap, skill matchup, hammond favored though.
Lucio, the lucio should win this imo.
Zen, ball has the advantage if he catches Zen off guard. Discord absolutely nukes ball though.
Mercy, mercy isn’t known for 1v1s.
Moira, slowest 1v1 in the universe. Ball favored if they can aim.