Austin Thomas had three hits to lead Hoover's 10-hit attack, while Corey Bird, Cody Bowen and Hunter White added two hits apiece. White also knocked in a pair of runs.
For Clay County, Ethan Smith had three hits, while Dalton Holcomb knocked in three runs.
Hoover will face Nicholas County at Clay today at 5 p.m., with a loser's bracket, elimination game to follow at 7 p.m.
Winfield 3, Point Pleasant 2 - The Generals (14-16) captured the Class AAA Region 4, Section 1 title with the home win.
Jordan Clark and Tanner Bailey had two hits apiece to lead Winfield.
For Point Pleasant (18-14), Gage Buskirk had two hits and two RBI.
Logan 10, St. Albans 0 - Johnny Morrison tossed a four-hit complete game to lead the Wildcats to a Class AAA Region 4, Section 2 win.
Zach Minnick led Logan (18-18) with two hits, including a homer and three RBI, while Josh Rein and Chase Preston knocked in two runs apiece.
Section 2 play will continue today when Nitro travels to Logan for a 6:30 p.m. contest. St. Albans (20-10) will play the winner on Saturday.
Charleston Catholic 9, Buffalo 0 - Andy Houer and Rocco Wilcox combined on a three-hitter and Thad Jameson had two hits and four RBI to lead defending regional champion in the Class A Region 4, Section 4 Tournament at Triana Field.
Charleston Catholic (23-9) will seek the sectional championship today at 4:30 p.m. at Triana Field when it faces the Bison (11-13).
Hoyer and Sam McKown had two hits apiece for Catholic.