Each team missed shots in the waning moments to win the game in regulation and the first overtime.
Tied at 63-all, the Wolverines began the parade to the foul line in the second overtime. They converted 14 of 16 free throws, and made 29 of 44 for the game.
Robert Baker led Walker (1-0) with 20 points, McCullough and Lahue each scored 16 and Spencer Palladino finished with 13.
The Wolverines will host Atlanta International on Friday.
McEachern 53, North Cobb 33: The Indians broke open a one-point game in the third quarter and went on to beat the Warriors in the Region 4AAAAAA opener for both teams.
Leading 16-15 at the half, McEachern went on a 17-7 run in the third quarter and pulled away in the fourth.
Freddie Brown led three Indians in double figures with 13 points. Logan McIntosh scored 12 points and Rajohn Lewis added 11. A.J. Jones had three points with six assists, and Jharen Poole added two points and a team-high 10 rebounds.
Dee Beusejour led North Cobb with eight points.
McEachern (2-0, 1-0) will travel to Marietta on Friday. North Cobb (0-1, 0-1) will host Pebblebrook on Thursday.
Marietta 67, South Cobb 65: Tyrell Tomlin scored 19 of his 20 points in the second half, and the Blue Devils rallied from down six after three quarters to pull out an Region 4AAAAAA opening victory.
KirVonte’ Benson scored 15 points, connecting 11 of 13 from the foul line, Rayveon Thornton added 11 points, and D.J. Bostick, playing an emergency point-guard role, finished with five points and five assists in the win.
Wesley Ingram led South Cobb with 20 points and John Holiday finished with 17.
Marietta (2-0, 1-0) will host McEachern on Friday while the Eagles (0-3, 0-1) travel to Campbell.
Harrison 69, Kennesaw Mountain 60: Harrison hit four 3s in the second quarter, took a 12-point lead and never looked back.
Kennesaw Mountain had a fourth quarter run but Harrison won it by hitting 12 fourth quarter free throws.
Justice Morgan and Jack Forrest both had 18 points to lead the Hoyas. Devantre Young was also in double figures with 10 points. Brandon Powell contributed with nine points.
Andrew Jimenez had 19 points to lead the Mustangs. Brian Bonck had 17 and Nigel Hayes had 14.
Harrison will host Hillgrove on Friday while Kennesaw Mountain heads to River Ridge.
Hillgrove 70, Campbell 55: Hillgrove got off to a quick start in its Region 4AAAAAA opener at home and took a 13-point lead at the half. The Hawks going 8-for-9 on the free throw line in the second quarter alone fueled the separation. Kyle Castlin leading with 23 points. B.J. Brown had 19.
Pope 45, Etowah 42: Cole Childers hit a 3-pointer at the buzzer to seal the non-region win for the Greyhounds. He scored six points, all in the second half on 3-pointers.
Chase Hutchins had 17 points to lead the Greyhounds (1-0). Drew Romich had 13 points.
Pope was losing 14-2 after the first quarter as a result of poor shooting but began hitting its shots afterwards and outscored Etowah by nine in the fourth to win it.
Pope will be playing Douglass of Atlanta in the North Forsyth Tournament on Saturday.
Shiloh Hills 65, Covenant 34: Jon Allen scored 13 points and pulled down 13 rebounds at the Challengers rolled to victory.
Shiloh Hills jumped out to a 32-5 lead after the first quarter and was never threatened.
Jonny Jenkins and Mac Jones each added 10 points. Austin Greenway scored six points with six assists and five steals.
The Challengers (2-1) will host Maranatha on Thursday.
Harrison 67, Kennesaw Mountain 35: Kaylyn Brooks made four 3-pointers and scored a game-high 20 points to lead the Lady Hoyas to a Region 4AAAAAA-play opening victory.
Melissa Bartow scored 10 points with four rebounds, Bailey Cross pulled down seven boards and Brooks added six steals and five rebounds in the win.
Anna Stewart and Jaylyn Carr each scored nine points to lead Kennesaw Mountain.
McEachern 71, North Cobb 48: The Lady Indians opened the season with a commanding win over one of their key Region 4AAAAAA rivals.
Down two after the first quarter, McEachern (1-0, 1-0) responded by outscoring North Cobb (0-1, 0-1) by a 56-31 margin the rest of the way.
Te’a Cooper led all scorers with 23 points and also added six assists. Taylor Gordon, who played her first two seasons at North Cobb before sitting out last season, had 17 against her former team.
Jada Lewis had a productive game with 11 points, eight assists and six steals. Caliya Robinson, a transfer from Kell, had a double-double of 10 rebounds and 10 assists.
McEachern will travel to Marietta on Friday.
Kyrie’ Chandler had 18 points to lead North Cobb, which will host Pebblebrook on Friday.
Hillgrove 66, Campbell 45: Recent Georgia signee Mackenzie Engram showed her skills in the Region 4AAAAAA game, just missing a triple-double.
Engram had 21 points, 14 rebounds and eight blocks. She was one of three players to score in double digits, along with Jaya Smith (11) and Tene Thompson (10).
Hillgrove (2-0, 1-0) trailed after the first quarter, but it took the lead with a 10-point edge in the second. The Lady Hawks also dominated the final period with a 24-9 edge.
Mikayla Wilson and Simone Spencer each had 10 for Campbell (0-1, 0-1), which will host South Cobb on Friday.
Hillgrove will travel to Harrison on Friday.
Marietta 77, South Cobb 19: The Lady Blue Devils had little trouble in the Region 4AAAAAA game, racing out to a 36-point halftime lead.
Tatiana Foster led Marietta (2-0, 1-0) with 20 points, while Jacky Jones had a double-double of 17 points and 14 rebounds.
Pope 66, Etowah 55: Kierra Henry’s success from the free-throw line played a pivotal role as the Lady Greyhounds won their season opener.
Henry, who scored a game-high 29 points on the night, went 14-for-17 at the line, including 6-of-7 in the fourth quarter. That helped Pope
(1-0) pull away from what was a narrower game after three periods.
Bria Johnson added 19 points, with five second-half 3-pointers. Esther Paulk had 12 points, and Dyanna Freeman led the defense with seven steals and eight rebounds.
Pope will travel to Cumming on Saturday for North Forsyth’s Thanksgiving tournament. It begins play with Duluth.
Walker 50, Yeshiva 23: The Lady Wolverines clamped down on Yeshiva’s top shooter in the third quarter and held the team scoreless, which helped break open a close first half.
Amitha Muthiah had 12 points to lead Walker (1-0) and Vicki Hudsonadded 11. Haley Timbrook also finished with 11. Haley Herold had eight points and six rebounds and Timbrook added five assists.
Walker will host AIS on Friday.
Mount Paran Christian 65, Pace Academy 36: Pace Academy jumped on Pace in the first quarter and ended it with a 21-6 lead. The Lady Eagles continued their aggressive surge and took a 37-13 lead at the half.
Que Morrison had 17 points to lead the Lady Eagles. Renee Van Horn scored 16 and Taya Welch scored 11.
Mount Paran’s defense held Pace to single digit in each of the first three quarters.
Shiloh Hills Christian 50, Covenant Christian 36: Samantha Henderson and Hannah Manross each had double-doubles as the Lady Challengers won handily.
Henderson had 13 points and 10 steals go with four assists, while Manross just missed a triple-double with 13 points, 12 rebounds and nine steals.
Kayla Allen added 10 points and four steals, and Abigail Hendrix finished with eight points and six assists.
Shiloh Hills (3-0) will host Old Suwanee on Thursday.
North Cobb wins a pair: Blaine Martinez and Joseph Buata each had perfect nights as the Warriors won two of three matches.
North Cobb beat Chattooga 60-15 and Druid Hills 48-36 before being upended by host Rockmart 65-18.
Buata went 3-0 with two pins and a forfeit at 132 pounds, while Martinez did the same at 170.
The Warriors return to the mat Friday at Sprayberry.