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INDIANAPOLIS, Ind. – The marathon that was the three-day, 253-pick NFL Draft had run its course Saturday evening.

Next, the mad dash for players deemed good enough to battle for a roster spot, but lacking something that kept them from having their names announced in Chicago.

Indianapolis Colts general manager Ryan Grigson appeared semi-whipped by the process but upbeat about the slew of players he grabbed in the hectic moments after the draft.

“Really excited about those guys, a bunch of guys on our ‘front board,’’’ he said. “Got some exciting players that we thought of drafting as well. Fortunate to sew those up.

“The scouts, coaches worked in unison and really it was controlled chaos. (Assistant vice president of football operations) Jimmy Raye orchestrates all that and when it gets dicey, coach and I get involved. We got some really quality players in the ‘draft after the draft’ as we call it.’’

The Colts haven’t announced their list of collegiate free agents, but various social media postings – by colleges, by players – indicate they’ve reached agreements with approximately 20 players. Another few are expected to come in for a tryout for the three-day rookie minicamp that begins Friday at the team complex.

While the prospects weren’t considered draft-worthy by 32 teams, don’t casually discard them. The Colts certainly don’t. They’ve had at least one undrafted rookie signed immediately after the draft make the opening day roster for the last 17 years. That’s the NFL’s longest such active streak.

Remember Dominic Rhodes? Gary Brackett? Melvin Bullitt? Terrence Wilkins? Justin Snow? Darrell Reid?

The Colts’ pre-draft roster consisted of 66 players. Incredibly, 30 weren’t drafted. A few of the notables: Adam Vinatieri, Mike Adams, Matt Overton, Joe Reitz, Zach Kerr and Jack Doyle.

The next wave of yet-to-be-officially-confirmed undrafted talent:

WR Danny Anthrop, Purdue

WR Reece Horn, Un. of Indianapolis*

S Andrew Williamson, Vanderbilt

LB Anthony Sarao, USC

WR Tevaun Smith, Iowa

OT Adam Redmond, Harvard

LS Harrison Elliott, Air Force*

OT Isiah Cage, Wisconsin-Eau Claire

DE Ron Thompson, Syracuse

RB Josh Ferguson, Illinois

TE Darion Griswold, Arkansas State

DT Delvon Simmons, USC

DB Leviticus Payne, Cincinnati*

CB Daniel Davie, Nebraska

OLB Sterling Bailey, Georgia

DT Julian Campenni, Connecticut*

QB Blake Frohnapfel, Massachusetts*

OL Davante Harris, Appalachian State

S Tigi Hill, Hawaii

OLB Curt Maggitt, Tennessee

WR Mekale McKay, Cincinnati

CB Chris Milton, Georgia

G Jamelle Naff, TCU

QB Ammon Olsen, Southern Utah*

WR Chester Rogers, Grambling State

*minicamp tryout