People give him a lot of crap, but plenty has happened that was out of his control, and if it hadn't happened, people probably wouldn't be calling for his head. We were a lock for the tournament last season, probably would have been a 5 seed mininum, until Nolen went down, which also occurred shortly after Devoe's midseason transfer.
Key word here is the word "a." If it were only one, we'd be in great shape.
2009-10 season
Royce White suspended due to criminal charges, later transfers without ever playing a game in maroon and gold.
Trevor Mbakwe suspended due to criminal charges
Al Nolen becomes academically ineligible for second semester (I recall he had family troubles that could have caused a drop in his grades and Tubby tried to get him a waiver so he could still play)
2010 offseason
Justin Cobbs transfers to be closer to home
Paul Carter transfers to be closer to his sister with cancer
Both are replaced by spring recruits
2010-11 season
Oto Osieniks doesn't get past NCAA clearinghouse, allowed to practice with team but not play
Devoe Joseph begins the season on suspension
Mo Walker goes down with a knee injury. Had the injury occurred a mere two games earlier, he would have been eligible for a hardship waiver
Devoe Joseph transfers to Oregon midseason after being suspended on two occasions earlier in the season
Al Nolen suffers season ending foot injury in January, only a week or two after Joseph's transfer
Maverick Ahanmisi is the only point guard or combo guard left on the team, Hoff becomes the primary point guard, Rodney moves to the two, $hitstorm brews
2011 offseason
Colton Iverson transfers
Replaced by spring recruit
Julian Welch joins Gophers
2011-12 season
Mo Walker still not playing halfway through season, a year and a month or two after the injury
Trevor Mbakwe injured in the 6th game
Over the last three seasons, this one included, we have had no less than:
5 transfers
3 season ending injuries
3 players unexpectedly sit on the bench for a season
1 player who was academically ineligible for second semester and thus, most of the conference schedule
1 player who was suspended for most of the first half of the season, before transferring in January
Transfers have become a yearly occurrence, and we've had 3 season ending injuries in the last two years. Last season we had a midseason transfer and a season ending injury at the same position, and not just any position, but at PG, perhaps the most vital position on the team.