Jim Harbaugh has quickly become the master of the sub-tweet.

The Michigan coach had a timely indirect response when his former team, the San Francisco 49ers, fired their first-year coach last month.

The latest tweet could’ve easily been in response to the SEC’s attempt to block Michigan’s spring break practices in Florida, which surfaced on Tuesday.

If it was, this was the perfect response:

For the record, Harbaugh never tweets a question of the day. But that question was asked at an interesting time given the controversy yesterday’s report created.

Harbaugh has had to deal with grief from the SEC before. The conference also tried to put a ban on Harbaugh’s satellite camps, which were all over the south during the offseason.

If Harbaugh’s tweet was his way of responding to the SEC’s latest restriction attempt, it certainly wouldn’t be a surprise.