The Bobcats held a 1-0 lead at the break before tacking on another goal midway through the second half to claim their 10th victory of the year.
Although the Tigers (4-4-2) put heavier pressure on Giles County's net in the second half, the Bobcats still outshot MCHS 15-12 overall.
Luis Zarate and Andres Acosta led Marshall County with four and three shots respectively, while Brad Pippen attempted two shots. Ivan Leyva, O'Shay Foreman, and Chris Martinez each took one shot for the Tigers as well.
Bobcat goalie Jacob Lowry turned in a solid performance in net and finished with eight saves, while MCHS goalie Luis Consuelo had five saves.
"We just couldn't convert today. We had lots of good scoring chances in the second half and controlled the ball, but couldn't connect," said Marshall County coach Lisa Raffo. "Playing teams like these outside our District always helps us. We just need to fine tune a little bit. Most of our young players got in the game today and played well."
Giles County got on the board just eight minutes into the contest when Blade scored on a header after receiving a pass from Whetsel in front of the net.
Both teams struggled to create quality scoring chances the rest of the first half before Lowry made a diving save on a shot by Leyva early in the second stanza to maintain the Bobcats one-goal lead.
After Lowry caught a close range shot by Pippen in the 57th minute, Whetsel gave Giles County a 2-0 advantage in the 60th minute when he beat a Marshall County defender in the middle of the field and fired a low, skidding shot into the right hand side of the net from 15 yards out.
Lowry then made another diving save on a shot by Zarate in the 66th minute to preserve the Bobcats' seventh shutout of the season.