When in a team the manager isn't active (permanently or not), when the new season is starting and the team doesn't have 14 players with contract, the game gives that team some players (old, 2-3* , 1 season for retired) so the team will be able to play a match.
Those are teams from my (reserves) league.
The blanks are from players that team has, but didn't renew their contract yet (and we can't see them).
Th 7th day, he 's gonna loose permanently those players if not resign their contracts.
From that day, we 'll see his team playing with those veterans and this formation.
His opponent also isn't active this season.
The veterans he got wasn't so good (he got many GKs
) so his team had many players out of position and the game set his good ST in defense, so the first team won easily.
* and now he is first in my league