Blankenship scored from two yards out the put the Bobcats (2-1) up 31-17 early in the fourth.
The Thundering Herd (2-1) came right back as Rakeem Cato threw a 38-yard touchdown to Gator Hoskins, then forced Ohio to punt on the ensuing drive, but Cato was intercepted by Devin Bass on the next play.
Following a field goal by Ohio, Cato rushed for a touchdown to cut the deficit to three, but the following onside kick was recovered by the Bobcats to seal the game.
Tettleton was 25-for-38 with a touchdown and Matt Waters had 83 yards on six receptions.
Cato finished 30 of 44 for 367 yards for Marshall.
Tommy Shuler caught 9 passes for 95 yards receiving while Hoskins had 81.
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Feleipe' Franks, the No. 4 pocket passer in the ESPN 300 and No. 59 player overall, committed to Florida after breaking his verbal pledge to LSU amid the Tigers' coaching uncertainty.
After finishing 97th in the FBS in scoring and 75th in passing yardage, Minnesota has fired offensive coordinator Matt Limegrover and passing game coordinator Jim Zebrowski, the school announced.
Clay Helton passed the latest round of the USC head coaching survivor test by beating UCLA, but there are still some who would prefer a big-time name.
Here are some names to remember in the coaching search at Georgia.
Six days after his death from brain cancer, hundreds of people, including Michigan football players, attended a memorial service for the 5-year-old grandson of former coach Lloyd Carr on Sunday.