Pineiro was 11 of 14 from the field. Cameron Forte had 16 points with 10 rebounds and Collin Spickerman chipped in 13 points for Portland State (2-1)
Shaquille Hines scored 18 points on 7-of-17 shooting, and Dan Kimasa added 10 points with 11 rebounds to lead Texas-Rio Grande Valley (1-3).
The Vikings had a 10-point lead midway through the first half and stretched it to a 40-22 halftime lead. Pineiro put up 17 points on 7-of-8 shooting from the field with a free throw in the half.
The Vaqueros opened the second half with a 9-2 spurt to pull to 42-31. Portland State answered with a 21-13 run and lead 62-44 with ten minutes left. Forte scored eight points and Pineiro added five points during the span.