Here are the top 20 teams per the RPI. As I understand, the committee considers the RPI rank, the conference record (especially in the baseball conferences, which are the SEC, the ACC, and the Big 12), and the Quad 1 record. Considering the teams' performances in the conference tournaments, the conference record is not shown at this point. Also, the strength of schedule is not shown below.
Baseball America and D1 Baseball are both showing Texas as the #1 overall seed because of its 17-11 Quad 1 record. Oregon's 9-1 Quad 1 record is the best in the country, but they had a bunch of bad losses. Of the teams in the top 16, the Rebels' Quad 1 record at 19-14 is #2 behind Texas. At this point, the Rebs should be a national seed IMO.
.. Team........conf.....conf rec...record...Q1 rec
1 Vanderbilt SEC....(19-11) 41-16....17-14
2 Georgia SEC.......(18-12) 42-15....11-11
3 Auburn SEC .......(17-13) 38-18....15-12
4 Texas SEC.... ......(22-8) 42-12...17-11
5 Arkansas SEC... (20-10) 43-13...14-10
6 Ore. St.Indep (0-0) 41-12-1..11-11
7 Clemson ACC (18-12) 44-15....10-9
8 N.Carolina ACC (18-11) 40-12.....8-5
9 C.Carolina S.Belt (26-4) 47-11.....4-5
10 Ole Miss SEC (16-14) 40-18...19-14
11 LSU SEC (19-11) 43-14...13-11
12 FSU ACC (17-10) 38-13...13-9
13 Tenn. SEC (16-14) 43-16...14-11
14 UCLA B1G (22-8) 41-15.....3-7
15 Bama SEC (16-14) 41-16...14-12
16 TCU Big 12 (19-11) 39-17.....8-7
17 Florida SEC (15-15) 38-20...12-17
18 Oregon B1G (22-8) 42-14....9-1
19 D Baptist CUSA (21-6) 40-15...4-4
20 USM S Belt (24-6) 44-13....7-4