| Rank | Team | Comments | Prior |
| 1 |  | Oklahoma | Sooners went 5-0 at the GCU Kickoff Tournament and scored at least four runs in every game. | 1 |
| 2 |  | Florida | Florida starts the 2018 season on a strong note as they swept the USF-Wilson DeMarini Tournament. | 2 |
| 3 |  | UCLA | Bruins swept the Stacy Winsberg Memorial Tournament as they were very dominant all weekend. | 3 |
| 4 |  | Oregon | Ducks scored 73 runs this weekend down in Tempe and picked up wins over Georgia and Fresno State. | 4 |
| 5 |  | Alabama | A flawless opening in the circle for the Crimson Tide as Courtney Gettins threw a no-hitter in her season debut. | 5 |
| 6 |  | Washington | Washington outscored their opponents 70-3 at the Peterson Hotels Invitational this weekend. | 6 |
| 7 |  | Texas A&M | Aggies were tested against Houston and Boston College, but won all four games this weekend. | 8 |
| 8 |  | Arizona | Wildcats rebounded from the Oklahoma State loss and ended up 4-1 on the weekend. | 7 |
| 9 |  | Baylor | Gia Rodoni's no-hitter on Friday set the tone for Baylor as they swept Northwestern State this week. | 9 |
| 10 |  | Florida State | Seminoles took Texas State's best shot and got a nice win over the Bobcats and dominated the rest of the week. | 10 |
| 11 |  | Tennessee | Tennessee was tested out in Tempe against Arizona State and Utah, but found a way to win both games. | 11 |
| 12 |  | LSU | LSU did a nice job offensively this weekend as they went 4-0 at home to start the 2018 season. | 12 |
| 13 |  | Auburn | Auburn goes 6-0 in week one to start off the Mickey Dean era as the Tigers only allowed one run all weekend. | 13 |
| 14 |  | Ole Miss | Rebels go 3-1 at the Sand Dollar Classic beating Virginia Tech, but they did fall to Lipscomb. | 14 |
| 15 |  | Minnesota | Minnesota got a nice mix of timely hitting and quality pitching as the Golden Gophers went 5-0 in Vegas. | 17 |
| 16 |  | Georgia | Bulldogs picked up wins over Oregon State, Utah, and BYU to highlight a 4-1 trip to Tempe. | NR |
| 17 |  | Louisiana | Louisiana won all five games and should have some added confidence heading into the Florida series this week. | 18 |
| 18 |  | Ohio State | Buckeyes start the 2018 season with a 5-0 record as they won a mix of close games and blowouts. | 25 |
| 19 |  | California | Golden Bears did a nice job in the circle enroute to the 2018 Capitol City Classic Title. | NR |
| 20 |  | South Carolina | Gamecocks had a productive trip down to Miami as they went 4-1 at the FIU Tournament. | NR |
| 21 |  | Oklahoma State | Oklahoma State picked up four wins out in Tempe, including a win over Arizona. | 24 |
| 22 |  | Arizona State | Sun Devils go 5-1 at home to start the season as they beat Notre Dame and Nebraska. | 23 |
| 23 |  | Kentucky | Wildcats dropped their opening series at New Mexico State, losing two of three games. | 19 |
| 24 |  | Michigan | Wolverines end up 3-2 in Tampa as they lost two tough ones against Florida and USF. | 15 |
| 25 |  | Utah | A tough opening weekend for the Utes as they went 2-3, but lost to Tennessee in controversial fashion. | 16 |
