The tough talking German made his first notable impression when he left Grant Holt at home to work on his fitness whilst hte rest of the squad faced a tough European game away to Maribor.
Sunday was a clear illustration why he wants the 32 year old forward to be sharper as Rosler's tactics took Bolton by storm.
The Latics were 2-0 to the good after just twenty-five minutes and Bolton were left shell shocked as the speed of football and aggressive pressure caused them to buckle.
All this action did take its toll on the players who were left lookng weary with sixty minutes on the clock. But it was clear to see that once they are up to speed we will be a tough nut to crack.
It is always sad to see a manager lose his job but Owen Coyle was the wrong man for the wrong job at the DW Stadium and he was quickly found out.
Rosler's immediate impact has suggested as much with a number of players responding already to his managerial style.
In partiuclar Callum McManaman looked like the man who destroyed Manchester City's team full of internationals at Wembley just six months ago.
There is still work to do on the scouser's fitness but his attitude was back up there and his appetite to play football had returned.
The same can be said for the majority of the playing squad who appeared hungry and aggressive for the first time in a long time.
All the above points well for the long term but, for the short term at least, we have a busy Christmas period to contend with and from his opening 180 minutes it would seem Rosler is the right man for the job.
To sum the Uwe Rosler effect up in a sentence the following sprung to mind on the way home from the game on Sunday.
That's the first Latics game I've enjoyed watching in quite some time.
And long may that continue.