As reported earlier:

Florida sophomore Caeleb Dressel added an even more unheard-of 18.23 to his record-breaking 18.39 second freestyle swim from Wednesday’s prelims at the 2016 SEC Swimming & Diving Championships in Columbia, Missouri.

He now has the two fastest 50 yard freestyles in the history of the sport. The records he broke in prelims:

SEC Championship Record, Matt Targett, 18.52 (2009 SEC Championships)

SEC Record, Cesar Cielo, 18.47 (2008 NCAA Championships)

American Record, Nathan Adrian, 18.66 (2011 NCAA Championships)

NCAA Record, Cesar Cielo, 18.47 (2008 NCAA Championships)

U.S. Open Record (fastest ever), Cesar Cielo, 18.47 (2008 NCAA Championships)

In prelims, Dressel, despite swimming the fastest 50 free ever, was a touch long on his turn, leaving the door open to take the record even lower, and the race was won by the time he came up off the start, but the record was earned with a better turn.

From another angle, courtesy University of Florida Athletics:

And from another angle, courtesy Auburn Swimming & Diving:

#HungarianHammer is 2nd in 19.17, Darmody 7th in 19.52. pic.twitter.com/uNek6jRcW8 — Auburn Swim & Dive (@AuburnSwimming) February 18, 2016

Other major 50 frees prelims/finals combos: