Without Pete Carroll to square off against anymore, new Michigan Wolverines football coach Jim Harbaugh has found an adequate substitute waiting in Columbus, Ohio.

Not only has Harbaugh found a new rival in Ohio State coach Urban Meyer, but he seemingly has fired the first shot in what could be an interesting time in Big Ten football.

Contract puts Colin Kaepernick in same lame-duck situation as Jim Harbaugh in San Francisco?

Foxsports.com reported that Harbaugh took Meyer and the Buckeyes to task for their lack of transparency in dealing with running back recruit Mike Weber of Cass Tech High School in Detroit, who chose to sign with the Buckeyes after Michigan fired Brady Hoke.

Colin Kaepernick failed to develop under Jim Harbaugh with the San Francisco 49ers?

Buckeyes running backs coach Stan Drayton was instrumental in luring Weber to Ohio State, according to foxsports.com, but a day after National Signing Day, Drayton announced he was leaving Ohio State to become the running backs coach with the Chicago Bears.

Weber said on Twitter that he was "hurt" by the turn of events, foxsports.com reported, and Cass Tech coach Thomas Wilcher accused Ohio State of not being entirely honest with Weber.

"I can tell you right now that his family is not very happy," Wilcher said in a Friday interview with WMGC radio host Matt Dery. "I'm not mad at Coach Drayton. I'm mad at the protocol. Tell young men what's going on, so that they can believe in the university. I think this is a black eye on the university."

Harbaugh wasn't going to let a golden opportunity pass without his own remark on Twitter - hidden behind a lack of any explanation as for what or whom the remark was intended.

CBSSports.com surmised, tongue-in-cheek, that a Mexican restaurant may have failed to tell him that guacamole was extra when he ordered it or that a driver had failed to use a turn signal as the impetus for the tweet before connecting it to the Weber situation.

"So, yes, the tweet could totally be about the guac thing ... but in the current climate, 99.9 percent of Wolverines (and Buckeyes) fans are going to interpret any mention of deception as a shot across Meyer's bow -- and Harbaugh is certainly smart enough to know it," CBSSports.com wrote.

"The widespread prediction when Harbaugh was hired was that his personal rivalry with Meyer might quickly become one of the most intriguing in the Big Ten, and quite possibly the country. So far, that prediction is looking pretty spot-on."