Paul Richardson was the first to go, but the Colorado junior’s early entry into the NFL Draft likely will not affect the Pac-12 Conference title race in 2014.

Oregon’s Marcus Mariota and Hroniss Grasu were the first to say they would stay, and that likely moves the balance of power in Pac-12 preseason polls toward the Ducks.

Decisions to stay or go will still be coming from: UCLA quarterback Brett Hundley, running backs Ka’Deem Carey of Arizona and Bishop Sankey of Washington, receivers Marqise Lee of USC and Brandin Cooks of Oregon State — plus a few more — but here is a first look at the conference race next year.

Arizona: The Wildcats lose four seniors on offense, including quarterback B.J. Denker, but Carey seems likely to go as well. Six starters back on defense.

Arizona State: Should return eight starters on offense, including second-team all-conference quarterback Taylor Kelly and receiver Jaelen Strong. Started seven seniors on defense.

California: Whether it is good news or bad news, the Bears return almost everyone from their winless conference season with just two senior starters on defense. Quarterback Jared Goff returns along with the rest of the starting offense.

Colorado: Four starters gone on offense and three on defense. Quarterback Sefo Liufau and running back Michael Adkins II provided hope as true freshmen.

Oregon: Mariota and Grasu give Oregon 10 returning starters on offense with or without De’Anthony Thomas, who could go into the draft. Five seniors graduate on defense, and cornerback Ifo Ekpre-Olomu is likely gone as well.

Oregon State: Graduates only five senior starters, including three offensive linemen, but Cooks and defensive lineman Scott Crichton could leave early.

Stanford: Loses four offensive starters but returns quarterback Kevin Hogan and receiver Ty Montgomery. Four gone on defense, too, and junior safety Ed Reynolds is a possibility to go pro.

UCLA: Ten starters back on offense if Hundley returns, not including Miles Jack. Two-time all-league offensive lineman Xavier Su’a-Filo is another player who could leave early. Seven returning starters on defense, including Jack.

USC: Steve Sarkisian’s first team should be experienced. Offensive tackle Kevin Graf and linebacker Devon Kennard were the only senior starters for the Trojans, who are likely to also lose Lee. Defensive lineman Leonard Williams is probably the only first-team all-conference defender who returns next season.

Utah: Loses four starters on offense, but Travis Wilson’s future at quarterback is uncertain. The defense will have a new look after graduating seven starters.

Washington: Loses only two senior starters on offense, but Sankey and junior tight end Austin Seferian-Jenkins may head for the NFL. Four starters graduate on defense.

Washington State: Three offensive linemen are the only losses on offense but five graduate on defense.