Chris Burrows' jumper gave Cordova a 55-38 lead before Marietta (2-11) mounted its comeback. Two free throws from James Henderson ignited the Blue Devils' 18-1 run to close out the fourth quarter and send the contest into overtime.
Marietta, which had a difficult time getting shots to fall all night, finally strung together some big baskets to get themselves back in the contest.
The Blue Devils' defensive pressure, coupled with poor shooting from the Wolves, added to the comeback as Henderson scored seven during the run and Rob Greer added five. Jay Ellis, who scored all 12 of his points in the second half, also contributed with five.
Opportunities were there for the Blue Devils to take the lead late in the contest, but they could only shoot 4-for-8 from the free-throw line in the final minute.
The Blue Devils trailed by two points or less on five different occasions in the final minute, but couldn't make their free throws to get over the hump, sending the contest into overtime tied at 56-all.
Cordova scored the first five points in the extra session, behind jumpers from Craig Hill and Terrance Carroll, and added a free throw from Burrows to stake a 61-56 lead.
Jennings' jumper halted the spurt, and the two teams traded field goals until Burrows' free throw put Cordova ahead 66-62. Carroll's two free throws then made the score 68-62 with 13.3 seconds remaining.
Jennings' layup with 8.3 left was Marietta's final score of the game as Cordova was able to maintain the four-point win down the stretch.
"I saw all game that we had opportunities, but we just couldn't get stops," Marietta coach Matt Lyons said. "We wouldn't get a stop, and they'd make a bucket and we didn't get a score.
"(Cordova) scored one point over the 4 four minutes, and I asked my guys, 'Where was that in the first 3 quarters?' I don't know, but we have to find that."
Marietta trailed 21-11 at the end of the first quarter and 33-21 at halftime. The margin grew to 16 points entering the fourth quarter and reached its peak of 17 points on two occasions in the fourth.
Jennings finished with 13 points and six rebounds for Marietta, while Henderson collected 17 points and 11 rebounds. Greer totaled 12 points, four rebounds and four steals.
Hill led all scorers with 24 points and grabbed eight boards for the Wolves, while Burrows and Carroll each added 17 points.