In a season in which the Southeastern Conference (SEC) has dominated the No. 1 spot atop the ESPN.com/USA Softball Collegiate Top 25 Poll, the Oregon Ducks (30-4, 8-1 Pac-12) have become the first non-SEC squad to claim the No. 1 spot for the first time in 2015.

Oregon, who has remained in the Top 3 all season long, earned their No. 1 ranking following a 5-1 week, including two run-rule wins over then-No. 17 Washington (31-9, 3-5 Pac-12).   For their efforts, the Ducks captured 10-of-20 first place votes, while LSU garnered seven first-place votes and Florida nabbed three first-place votes.

Click here to see the complete ESPN.com/USA Softball Collegiate Top 25 Poll.

Starting off their week with the final matchup of a Pac-12 series at Utah, Oregon pounced on the Utes for a 12-0 shutout win before heading back to Eugene for a stretch of home games.  Picking up two wins over Utah Valley, 9-1 (six innings) and 3-0, the Ducks then set their sights on Washington.

In game one of the series, Oregon came out hot as Cheridan Hawkins (Anderson, Calif.) picked up her first career perfect game in an 8-0 (five inning) shutout. Washington rebounded in game two of the series, snapping the Ducks 13-game winning streak with their own 10-2 (five inning) run-rule.  Oregon captured the series in the finale, blasting eight home runs en route to a 15-6 (five inning) win.

LSU (32-4, 6-3 SEC) fell from the top spot to No. 2 this week after dropping two games to then-No. 15 Kentucky (23-9, 3-6 SEC) on the road.  The Tigers started their week with an 8-0 (five inning) shutout over then-T24 South Alabama (24-7, 8-3 Sun Belt) in a standalone game before their SEC matchup against the Wildcats.  In game one, Kentucky posted a 3-1 win before a 5-2 come-from-behind win on Saturday that claimed the Wildcats their first SEC series win of the season.  LSU avoided the series sweep in their final meeting of the series, shutting out Kentucky in a 2-0 win.

Florida (32-4, 5-4 SEC) fell one spot to No. 3 this week despite capturing two SEC series wins over the course of the week.  In a completion of a rained-out series at then-No. 5 Alabama (25-8, 8-4 SEC), the Gators and Crimson Tide split Monday’s doubleheader with Florida taking a 4-1 win and Alabama taking a 5-1 win to avoid a series sweep.  The Gators then traveled to Starkville, Miss. for a three game series against Mississippi State.  Florida took the first two games, 3-2 and 16-2 (five inning) before falling to the Bulldogs 5-3 in their final game.

Michigan (31-5, 5-1 Big 10) holds onto No. 4 this week after a 3-1 week at home.  The Wolverines notched an 8-2 win over Western Michigan before taking on Iowa in a Big 10 series contest.  Michigan shutout the Hawkeyes 6-0 in game one of a doubleheader and posted a 7-4 win to clinch the series.  Iowa got the final say in their series finale, besting the Wolverines 6-4 while snapping Michigan’s nine-game winning streak.

Rising one spot to No. 5 is Oklahoma (27-5, 3-0 Big 12) who opened Big 12 play this week on the road against Texas Tech.  The Sooners utilized their strong offense to sweep the series, capturing two wins via run-rule while outscoring the Red Raiders 43-12.  During the three-game series, Lauren Chamberlain (Trabuco Canyon, Calif.), a member of the USA Softball Collegiate Player of the Year Top 50 “Watch List”, improved her all-time home run record to 87, tying her for second place while putting her just three home runs shy from tying the all-time leader.

Rounding out the Top 10:  No. 6 Alabama fell one spot following a 4-2 week with wins over Florida and then-No. 23 Texas A&M (25-9, 7-5 SEC); Auburn (35-4, 8-1 SEC) continued their rise in the poll to No. 7 this week following a series win over then-No. 20 Missouri (22-7, 5-4 SEC); Georgia (29-7, 6-5 SEC) and UCLA (30-6, 5-1 Pac-12) are tied at No. 8 this week; No. 10 Louisiana-Lafayette (27-5, 12-3 Sun Belt) fell two spots this week after a 2-1 outing against Texas State.

Joining the Top 25 this week is No. 25 James Madison (27-6, 6-0 CAA) while last week’s No. T24 Virginia Tech (24-9, 3-8 ACC) fell out of the poll after being swept by unranked Notre Dame on the road.

The ESPN.com/USA Softball Collegiate Top 25 Poll is voted on by coaching representatives of 10 Division I Conferences in the 15 ASA/USA Softball Regions as well as members of the National and Local media who consistently cover Division I Softball across the country.