Chais Beloso, with late-inning help from Jeremy Evans, was the winning pitcher. Trace Allard led the Diamond attack with two hits and four RBIs.
The Diamond went into Thursday's conference season-ending doubleheader at Cape Fear with an 8-0 mark.
The first four Jack Britt batters of the game reached base against Beloso. A bases-loaded walk to Gabe Villegas forced in the game's first run.
Diamond coach Jeff Hewitt made a trip to the mound after noticing that Beloso and catcher Allard got their signals mixed on a couple of pitches. Beloso then struck out the next two batters before getting a pop-out to end the inning.
"I don't know how we got out of that mess," Hewitt said Thursday. "After we talked, we were all on the same page. Getting out of the first inning with one run was excellent."
On a night that the Diamond committed four errors, Jack Britt took a 2-0 lead with an unearned run in the bottom of the second. But the home team gave everything back and much more in the top of the third.
A one-out single by Zack Pickard was followed by walks to Justin Richardson and Josh Haley. One run scored on a passed ball before the Diamond took a 3-2 lead on a two-run single by Allard.
With two outs, another run scored on an infield error with Taylor MacDonald at bat. Lawson Thomas then capped the five-run frame with a run-scoring double that took one hop before bouncing off the fence in left-center.
The visitors stretched the lead to 7-2 in the fourth on a single by Jay Parkin, a Britt error on a ball hit by Pickard and a two-run double smashed down the left-field line by Allard.
Evans took over the mound duties for the Diamond in the fifth after Beloso allowed three hits, while striking out seven, walking four and hitting one batter in his stint. After Pickard singled, and later scored an unearned run in the top of the sixth inning, Britt capitalized on two Diamond errors in the bottom half to score twice, making it 8-4.
Singles by Thomas and Luc Ouellette helped Hewitt's squad build an insurance run in the top of the seventh. Britt got two men aboard with one out in its final at-bat before shortstop Ouellette started a slick 6-4-3 double play.
"It was beautiful," Hewitt said of the twin-killing that involved second baseman Pickard and Beloso at first. "In the glove, out of the glove, the ball never stopped moving. Pickard made a great turn. It was a great way to end the game."
In addition to Allard, Pickard, Lawson and Ouellette had two hits apiece. Jack Britt got five hits in all off of Beloso and Evans.
The Diamond was looking to wrap up the first seed and home-field advantage for the state playoffs at Cape Fear on Thursday. The playoffs begin a week from Saturday. Hewitt's squad has a non-league game against Scotland at home next Wednesday at 7 p.m.
