Spikes had four fouls, but had Sykes second-guessing enough to force a travel.
On the ensuing possession, Spikes scored to put the Herd up four points - the final margin.
Along with senior Robert Goff and junior Yous Mbao, the Herd's big men played 44 minutes, scored 17 points and blocked 12 shots.
"We got great production out of the five today," third-year Marshall Coach Tom Herrion said. "Maybe the best production we've ever gotten since I've been here, collectively.
"Those three guys gave us a big day in the pivot."
Herrion also cautioned not to read too much into one statistical eyesore. Marshall was outrebounded 41-29. It is the first time a Herrion-coached MU team won while being minus-12 or worse on the boards.
"Nine of them were dead-ball rebounds," he said. "Minus-12 is a bad, bad, bad number on the glass ... bad. Nine of them were dead-ball which means we either tip, don't come up with it, block it out-of-bounds and they retain possession.
"It's a little deceiving in that regard."
It's the 10th time in 22 games this season Marshall has been outrebounded, which includes five of the last six games. If you've listened to Herrion over the past three years, you already know how closely he believes the outcome of the game is linked to rebounding production.
The Herd (10-12, 3-4 Conference USA) had lost eight of nine games this season when being outrebounded. Last year, MU lost six of seven when losing the battle of the boards. In Herrion's first season with the Herd, his team was 3-7 in those games.
That's 6-21 overall when coming up short on the boards.
Marshall is alone in seventh place in the C-USA standings. The Herd is two games back of a first-round bye in the conference tournament, but also two games ahead of last-place UAB and Rice.
Nine regular-season games remain, and Herrion's Herd can be thankful to have found its identity one month before leaving for the league tourney at Tulsa.
Jones, meanwhile, can be thankful to not have another trip to Marshall on the schedule.
The only venue where Jones is 0-3 as UCF coach is the Henderson Center.
Contact sports editor Chuck McGill at chuck.mcg...@dailymail.com or 304-348-7949.