This was a stream sniper on Twitch. Not the kind of cheating the OP is talking about.
His opponent was doing the same thing as (stealing pitches). He was watching the stream knowing what pitch Kyle chose and where he was throwing it. Way different than the cheater every other player runs into.

TheRealMoTiV_PSN
@TheRealMoTiV_PSN
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So I’ve noticed that everytime after I collect cards for collection and go back to conquest I get the error along the lines of “must have valid lineup of 10 players”.
Once you click ok and go to manage lineup the screen freezes on the flash screen between clicking “manage squad” and your squad popping up.
Cheaters
SDS Please read! Lineup Management Freezing. Possible recreation of Freezing