And everyone else's loss is certainly Reich Insurance Rangers Blue's gain.
New signing Seitler - who also scooped the Player of the Year award - continued where he left off as Reich maintained their eye-catching start to the new season.
It was honours even at the break with Louis Rawlings cancelling out Seitler's first-half strike.
But it was a different story after the restart as South Manchester Sports 2nd faded.
Reich Blue co-manager Tony Rosenberg said: "We've been happy with the start to the season. There's been a lot of new players and it was always takes time to gel and for us to get our ideas across.
"But they have taken things quickly on board so there's no complaints on our part."