Did Jim Harbaugh just subtweet the 49ers after they fired Jim Tomsula?

Less than a year ago, the San Francisco 49ers parted ways with Jim Harbaugh. Later, Harbaugh said the agreement was not mutual.

Harbaugh quickly ended up at Michigan, leading the Wolverines to a 10-3 record and a big win in the Citrus Bowl.

The 49ers? They hired coach Jim Tomsula, went 5-11, then on Sunday fired Jim Tomsula.

Shortly after the news broke, Harbaugh cryptically sent out this tweet:

We can't say for sure this is about the 49ers. But it wouldn't surprise us at all. (It's also not the first time he's potentially done it.)