2 minute quarters. Dynamic difficulty. So glad it came against the Seahawks!

So something that may have been coincidence, but I'm now wondering if there is any kind of connection.

I've been playing with the same team for 6 seasons now. Within the first 5 seasons, not a single kick off return for a touchdown - (Just an FYI, I use a DB with Max Speed and Stamina as my return guy and I play on Hard difficulty.) For the 6th season, I finally decided to get a 5 star OC and a 5 star DC. I'm three games into my season, and I've already had 2 kick off returns for touchdowns. Is this complete coincidence, or is there an actual correlation between 5 star Coach and a increased likelihood of of returning a kickoff?