Heading into the last weekend of January, there were 10 more undefeated Division I wrestlers than there are now. Which begs the question, what happened to them?

Bryce Meredith helped clue us in on just how much calamity there was, so let's take a look at the five days when those formerly undefeated wrestlers went down for the first time this season.

JANUARY 27

Sam Stoll, Iowa: Lost 3-2 to Adam Coon, Michigan 

Record at time of loss: 13-0

Coon, a 2016 NCAA finalist, won the battle of former junior Greco world bronze medalists in Iowa City, Iowa.

Chad Walsh, Rider: Lost 8-4 to Chance Marsteller, Lock Haven 

Record at time of loss: 16-0

Marsteller essentially locked up the top seed at EWLs when he beat Walsh in Lawrenceville, New Jersey.

Preston Weigel, Oklahoma St.: Lost 10-4 to Willie Miklus, Missouri

Record at time of loss: 6-0

Weigel was leading going into the second period before Miklus turned up the heat, allowing Miklus to pick up his second win of the year over a guy ranked #2 at the time.

JANUARY 28

Jason Nolf, Penn State: Injury default to John Van Brill, Rutgers 

Record at time of loss: 18-0

I get this one has an asterisk, but Nolf gets an official NCAA loss on his ledger.

FEBRUARY 3

Kollin Moore, Ohio State: Lost 6-3 to Anthony Cassar, Penn State

Record at time of loss: 18-0

The prohibitive favorite at 197 lost to Cassar in the match that essentially sealed Penn State's win over Ohio State at Rec Hall. Cassar also has a win over Moore in freestyle.

Myles Martin, Ohio State: Lost 10-2 to Bo Nickal, Penn State 

Record at time of loss: 22-0

Nickal had lost his previous meeting with Martin but put on a show and finished off the major to cement himself as the unquestionable favorite at 184.

FEBRUARY 10

Vincenzo Joseph, Penn State: Lost 9-6 to Alex Marinelli, Iowa

Record at time of loss: 16-0

The bear hug heard 'round the world set off a huge argument as to whether Marinelli or Isaiah Martinez should get the top seed at Big Tens.

Brandon Sorensen, Iowa: Lost 6-2 to Zain Retherford, Penn State

Record at time of loss: 18-0

For the second time in three years, Sorensen's first loss of the year was to Retherford.

FEBRUARY 11

Kyle Snyder, Ohio State: Lost 3-1 to Adam Coon, Michigan

Record at time of loss: 7-0

Coon avenged his 2016 Big Ten finals defeat to hand Snyder his first collegiate loss since the 2015 NCAA finals.

Luke Pletcher, Ohio State: Lost 11-5 to Stevan Micic, Michigan 

Record at time of loss: 22-0

Micic gave up a strange takedown in his CKLV loss to Pletcher but left nothing to chance this time around in Ann Arbor, MI, getting four takedowns and nearly four minutes of riding time.