McGinnis found go-to receiver Domonique James twice in the first half for gains of 44 and 33 yards. But the two would not hook up in the second half with Simpkins, a cornerback on defense, shutting down James.
The Chargers were without starting receiver Garrett McLaughlin and starting running back Tank Love.
McLaughlin had his appendix removed on Thursday, and Love was out after suffering a concussion during a Week 1 win over Casady.
“For being sort of patched together, I thought we did a pretty good job most of the night,” said Chargers coach Andy Bogert. “We were without McLaughlin and Tank, plus four offensive linemen. They just wore us down and we took a licking.”
After a 31-13 loss at Lawton MacArthur in Week 1, Clinton (1-1) fell from No. 1 to No. 3 in Class 4A this week.
“What we saw offensively tonight wasn't much different than what we saw last week,” Lee said. “Both those teams can go up-tempo and move the ball. The difference tonight was Heritage Hall had everyone going both ways like we do, whereas Mac only had a couple of players doing that.”