Michael Phelps, Katie Ledecky, Ryan Lochte and Missy Franklin are among the stars who will dot 26 finals across eights nights at the U.S. Olympic Swimming Trials in Omaha, starting Sunday on NBC, NBCSN and NBC Sports Live Extra.

The top two in each final will qualify for Rio, plus up to the top six finishers in the 100m and 200m freestyles for relay purposes, so long as the total Olympic team size does not exceed 26 men and 26 women.

Entry lists will be published later this week, but there is a chance that the Big Four of Phelps, Ledecky, Lochte and Franklin could swim in finals on all but the last night.

Phelps’ coach, Bob Bowman, said on May 31 that Phelps will enter the 100m and 200m butterfly and the 200m individual medley, plus at least one more event.

Phelps could also swim the 100m and 200m freestyles, perhaps with the goal of posting a strong time in preliminary heats or semifinals to further prove he deserves a spot in the Olympic 4x100m and 4x200m free relay pools.

Ledecky could swim the 100m through 800m freestyles and the 400m individual medley, though the latter could be merely to get her feet wet on the first day of the meet.

A question for Lochte is whether he will enter the grueling 400m individual medley on the first day. He is the reigning Olympic champion but rarely raced it in 2013 and 2014 before looking sharper in the last year and a half.

Franklin is probably the easiest to predict of the Big Four. She has kept the same primary events the last four years — 100m and 200m freestyles and 100m and 200m backstrokes.

Daily coverage will include qualifying heats on NBCSN and finals on NBC, with NBC Sports Live Extra streaming all coverage.

DayTime (ET) Network Key Events

Sunday, June 26 6 p.m.NBCSN Qualifying Heats (tape); 8 p.m.NBC M/W 400 IM; M 400 FR

Monday, June 27 6:30 p.m.NBCSN Qualifying Heats (tape); 8 p.m.NBCW 100 FL, 400 FR; M 100 BR

Tuesday, June 287 p.m.NBCSN Qualifying Heats (tape); 8 p.m.NBCM/W 100 BK; W 100 BR; M 200 FR

Wednesday, June 29 7 p.m.NBCSNQualifying Heats (tape); 8 p.m.NBCW 200 FR, 200 IM; M 200 FL

Thursday, June 30 6:30 p.m.NBCSN Qualifying Heats (tape); 8 p.m.NBCM 100 FR, 200 BR; W 200 FL

Friday, July 16 p.m.NBCSN Qualifying Heats (tape); 8 p.m.NBCW 100 FR, 200 BR; M 200 BK, 200 IM

Saturday, July 25 p.m.NBCSN Qualifying Heats (tape); 8 p.m.NBCW 200 BK, 800 FR; M 50 FR, 100 FL

Sunday, July 3 7 p.m.NBCW 50 FR, M 1500 FR