| Rank | Team | Comments | Prior |
| 1 |  | Washington | Washington is now 27-0 on the season after going 4-0 down in Vegas as they were tested against New Mexico State. | 1 |
| 2 |  | Florida | Florida swept Kentucky as they were pushed by the Wildcats in game two and rose to the occasion with a walk-off win. | 2 |
| 3 |  | UCLA | UCLA is now 24-0 as they knocked off Ohio State and survived a stiff test from Long Beach State. | 3 |
| 4 |  | Oklahoma | Oklahoma won two tough games against South Carolina to highlight a 5-0 week for the Sooners. | 4 |
| 5 |  | Oregon | Ducks tuned up for the UCLA series with 5-0 weekend at home against Montana, Weber State and Bryant. | 5 |
| 6 |  | Tennessee | Tennessee swept Missouri to kickoff SEC play this weekend as the Lady Vols keep on rolling. | 6 |
| 7 |  | Arizona | Arizona went 6-0 at home this weekend to win the Wildcat Invitational and beat a good USC Upstate team twice. | 7 |
| 8 |  | Texas A&M | Aggies get the sweep over Ole Miss in a critical opening SEC series. | 8 |
| 9 |  | LSU | LSU starts off SEC play on a high note with a sweep over Auburn in Baton Rouge. | 9 |
| 10 |  | Georgia | Bulldogs knocked off Arkansas in their SEC opening game on Saturday and will finish the series on Monday. | 10 |
| 11 |  | Baylor | Baylor beat Long Beach State and then went to the Liberty tournament and went 5-0 in that as well. | 11 |
| 12 |  | Alabama | Patrick Murphy won his 1,000th game and Alexis Osorio dominated in the circle as Alabama got back on track this week. | 13 |
| 13 |  | Florida State | Florida State got the offense back on track as they scored 34 runs in three games this week. | 14 |
| 14 |  | Arizona State | Sun Devils swept Minnesota and will get ready for a big conference series with Washington. | 16 |
| 15 |  | Auburn | Auburn just couldn’t get anything going at the plate against a strong LSU pitching staff. | 12 |
| 16 |  | Ohio State | Buckeyes went 3-1 this weekend at the Louisville Slugger Invite overcoming a tough loss to UCLA. | 15 |
| 17 |  | California | Golden Bears cruised through the Fresno State Tournament to improve to 23-3 on the season. | 20 |
| 18 |  | Michigan | Wolverines have now won 12 straight games after sweeping their way through the FAU Tournament. | 23 |
| 19 |  | South Carolina | South Carolina went 2-2 out in Norman as the Gamecocks battled the Sooners pretty well. | 18 |
| 20 |  | Texas State | Bobcats swept Georgia State to start conference play and are a threat to Louisiana's throne as the best in the Sun Belt. | NR |
| 21 |  | Mississippi State | MSU has quietly gotten off to a 21-3 start on the season and has been a dominant 18-1 at home so far in 2018. | NR |
| 22 |  | Long Beach State | 49ers had an up and down week but the 6-5 loss to UCLA should still be a confidence builder for them. | 17 |
| 23 |  | Oklahoma State | Oklahoma State keeps on rolling as they have won ten straight games to improve to 19-6 on the season. | 25 |
| 24 |  | Kentucky | Kentucky had a chance for one win against Florida but couldn’t hold off the Gators in game two of the series. | 21 |
| 25 |  | Louisiana | Louisiana went on the road and picked up a series win at Coastal Carolina to start Sun Belt play. | 24 |
