The former Giants running back played just one season for Harbaugh with the San Francisco 49ers in 2012, but the lone season didn't leave Jacobs with a lasting impression.
"Jim, I had a lot of respect for Jim when I was there — before I got to know him," Jacobs said on CBS Sports Radio. "I enjoyed my time there, but we didn't see eye-to-eye. I knew a little bit more about football than what they led on."
Jacobs and Harbaugh probably never met eye-to-eye because Jacobs practically did nothing to contribute during his lone season in San Francisco. After missing the first two months of the season with a knee injury, Jacobs played sparingly where had just five carries for seven yards in two games for the 49ers. He was then suspended for bashing the team on Instagram and released before the postseason.
The 49ers went 11-4-1 and lost in the Super Bowl XLVII to the Baltimore Ravens, 34-31. But despite the team's immensely successful season, Jacobs said that Harbaugh had no clue what he was really doing.
"Going somewhere where they don't have route conversions into certain coverages was just absurd," said Jacobs, who won two Super Bowls with the Giants. "They're just running routes in the defense, getting people killed. Size and strength is what they had, and that's why they won. Let's be real. They had great assistant coaches, but Jim didn't know what he was doing. Jim had no idea. Jim is throwing slants into Cover-2 safeties, getting people hurt. That guy knew nothing, man."
Harbaugh has been successful everywhere he's stopped in his coaching career. His first head coaching position was with the University of San Diego, where he led the Toreros to back-to-back eleven win seasons in 2005-2006. Harbaugh then had a revelatory three-year stint at Stanford University where he made a program not known for its football team into a Pac-12 title contender.
After his stop with the 49ers, which included two NFC Championship game trips and that Super Bowl run, Harbaugh returned to the college ranks to coach his alma mater Michigan. The Wolverines are 20-6 in his first two seasons.
