I had some time on hand and compiled the list of all of Reigns televised losses in the WWE:
2013:
{Spoiler}07/06/13 - Smackdown! - Daniel Bryan & Randy Orton - def. (DQ) (Reigns & Rollins)
10/06/13 - RAW - Randy Orton - draw (NC) (Reigns)
14/06/13 - Smackdown! - Daniel Bryan & Kane & Randy Orton - def. (sub) - Rollins tapped out (The Shield)
28/06/13 - Smackdown! - Christian & Jey Uso & Jimmy Uso - def. (pin) - Ambrose pinned (The Shield)
05/08/13 - RAW - Daniel Bryan & John Cena & Randy Orton - def. (DQ) (The Shield)
16/08/13 - Smackdown! - Mark Henry & Rob Van Dam & The Big Show - def. (pin) - Ambrose pinned (The Shield)
26/08/13 - Smackdown! - Daniel Bryan - draw (NC) (Reigns)
16/09/13 - RAW - Daniel Bryan - def. (DQ) (Reigns)
20/09/13 - Smackdown! - Daniel Bryan & Jey Uso & Jimmy Uso - def. (pin) - Ambrose pinned (The Shield)
23/09/13 - RAW - Daniel Bryan & Darren Young & Dolph Ziggler & Jey Uso & Jimmy Uso & Justin Gabriel & Kofi Kingston & R-Truth & Rob Van Dam & Titus O'Neil & Zack Ryder - def. (pin) - Ambrose pinned, Reigns pinned, Rollins pinned (The Shield)
04/10/13 - Smackdown! - The Big Show - def. (DQ) (The Shield & Randy Orton)
06/10/13 - Battleground - Cody Rhodes & Goldust - def. (pin) - Rollins pinned (Reigns & Rollins)
14/10/13 - RAW - Cody Rhodes & Goldust - def. (pin) - Reigns pinned after Big Shows interference (Reigns & Rollins)
18/10/13 - Smackdown! - Cody Rhodes & Daniel Bryan & Goldust - def. (pin) - Ambrose pinned (The Shield)
21/10/13 - RAW - Jey Uso & Jimmy Uso - draw (NC) (Reigns & Rollins)
25/10/13 - Smackdown! - Big E. Langston & Cody Rhodes & Daniel Bryan & Goldust - def. (pin) - Orton pinned (The Shield & Randy Orton)
27/10/13 - Hell in a Cell - Cody Rhodes (c) & Goldust (c) - def. (pin) - Rollins pinned (Reigns & Rollins; The Usos)
04/11/13 - RAW - The Big Show - def. (DQ) (The Shield & Randy Orton)
11/11/13 - RAW - C. M. Punk & Daniel Bryan - draw (NC) (The Shield)
18/11/13 - RAW - C. M. Punk & Cody Rhodes & Daniel Bryan & Goldust & Jey Uso & Jimmy Uso - def. (pin) - Ambrose pinned (The Shield & The Wyatts)
22/11/13 - Smackdown! - Jey Uso & Jimmy Uso & Rey Mysterio - def. (pin) - Ambrose pinned (The Shield)
29/11/13 - Smackdown! - Cody Rhodes & Goldust - def. (DQ) (Reigns & Rollins)
29/11/13 - Smackdown! - C. M. Punk & Cody Rhodes & Goldust - draw (NC) (The Shield)
29/11/13 - Smackdown! - C. M. Punk & Cody Rhodes & Goldust & Jey Uso & Jimmy Uso & Rey Mysterio - def. (pin) - Rowan pinned (The Shield & The Wyatts)
15/12/13 - TLC - C. M. Punk - def. (pin) - Ambrose pinned (The Shield)
30/12/13 - RAW - Big E. Langston & C. M. Punk & John Cena - def. (DQ) (The Shield)
20/12/13 - Smackdown! - C. M. Punk & John Cena - def. (DQ) (The Shield)
Stats for 2013:
{Spoiler}9 DQ's ; 5 NC's ; 1 SUB (1 Rollins) ; 13/16 PIN (2 Reigns, 4 Rollins, 8 Ambrose, 1 Rowan, 1 Orton) [matches/actual pinfalls]
2014:
{Spoiler}03/01/14 - Smackdown! - Jey Uso & Jimmy Uso - def. (DQ) (Reigns & Rollins)
03/01/14 - Smackdown! - C. M. Punk & Jey Uso & Jimmy Uso - def. (pin) - Ambrose pinned (The Shield)
26/01/14 - Royal Rumble - Batista won the Royal Rumble (Reigns)
27/01/14 - RAW - Daniel Bryan & John Cena & Sheamus - def. (DQ) (The Shield)
23/02/14 - Elimination Chamber - Bray Wyatt & Erick Rowan & Luke Harper - def. (pin) - Reigns pinned (The Shield)
24/02/14 - RAW - Bray Wyatt - def. (DQ) (Reigns)
03/03/14 - RAW - Bray Wyatt & Erick Rowan & Luke Harper - def. (pin) - Ambrose pinned (The Shield)
31/03/14 - RAW - Kane - def. (DQ) (Reigns)
28/04/14 - RAW - Randy Orton - draw (NC) (Reigns)
05/05/14 - RAW - Bray Wyatt & Erick Rowan & Luke Harper - def. (pin) - Reigns pinned after Evolution distraction (The Shield)
12/05/14 - RAW - Batista - draw (NC) (Reigns)
29/06/14 - Money in the Bank - John Cena won the WWE Championship ladder match (Reigns)
20/07/14 - Battleground - John Cena (c) - def. (pin) - pinned Kane (Reigns; Kane; Orton)
28/07/14 - RAW - Kane - draw (NC) (Reigns)
19/09/14 - Smackdown! - Rusev - def. (DQ) (Reigns)
21/09/14 - Night of Champions - Seth Rollins - def. (forfeit) - Roman Reigns didn't show up (Reigns)
30/12/14 - Smackdown! - Rusev - draw (NC) (Reigns)
Stats for 2014:
{Spoiler}1 Royal Rumble; 1 Ladder Match; 5 DQ's ; 4 NC's; 5 PIN (2 Reigns; 2 Ambrose; 1 Kane) ; 1 Forfeit
2015:
{Spoiler}02/02/15 - RAW - The Big Show - def. (pin) - Reigns pinned after Rollins interference (Reigns)
29/03/15 - Wrestlemania - Seth Rollins - def. (pin) - Reigns pinned (Reigns; Lesnar)
06/04/15 - RAW - Randy Orton - def. (pin) - Ryback pinned (Reigns; Randy Orton)
04/05/15 - RAW - Big E & Kofi Kingston & Xavier Woods - def. (pin) - Orton pinned (Reigns & Orton)
04/05/15 - RAW - Randy Orton - draw (NC) (Reigns)
11/05/15 - RAW - Kane - draw (NC) (Reigns)
11/05/15 - Payback - Seth Rollins (c) - def. (pin) - Orton pinned (Reigns; Ambrose; Orton)
14/06/15 - Money in the Bank - Sheamus won the MitB ladder match (Reigns)
16/06/15 - Smackdown! - Kane & Sheamus - def. (pin) - Reigns pinned after Bray Wyatt distraction (Reigns & Ambrose)
29/06/15 - RAW - Kane & Seth Rollins - def. (pin) - Ambrose pinned (Reigns & Ambrose)
06/07/15 - RAW - Sheamus - def. (CO) (Reigns)
19/07/15 - Battleground - Bray Wyatt - def. (pin) - Reigns pinned after Harper interference (Reigns)
10/09/15 - Smackdown! - Big E & Kofi Kingston & Xavier Woods - draw (NC) (Reigns & Ambrose & Jimmy Uso)
20/09/15 - Night of Champions - Braun Strowman & Bray Wyatt & Luke Harper - def. (sub) - Jericho passed out (Reigns & Ambrose & Jericho)
28/09/15 - RAW - Bray Wyatt - draw (DCO) (Reigns)
19/10/15 - RAW - Braun Strowman & Bray Wyatt & Erick Rowan - def. (DQ) (The Shield)
22/11/15 - Survivor Series - Sheamus - def. (pin) - Reigns pinned after Sheamus attack from behind and cash-in (Reigns)
30/11/15 - RAW - Alberto Del Rio & Big E & King Barrett & Kofi Kingston & Rusev & Sheamus & Xavier Woods - def. (pin) - Ambrose pinned (Reigns & Ambrose & The Usos)
13/12/15 - TLC - Sheamus won the WWE Championship TLC match (Reigns)
Stats for 2015:
{Spoiler}1 Ladder match; 1 TLC match; 3 NC; 1 DQ; 1 CO; 1 DCO; 10 PIN (5 Reigns; 2 Ambrose; 1 Ryback; 2 Orton) ; 1 SUB (1 Jericho passed out)
2016:
{Spoiler}24/01/16 - Royal Rumble - Triple H won the Royal Rumble (Reigns)
22/02/16 - RAW - Sheamus - draw (NC) (Reigns)
24/03/16 - Smackdown! - Bubba Ray Dudley - def. (DQ) (Reigns)
02/05/16 - RAW - A.J. Styles & Karl Anderson & Luke Gallows - def. (pin) - Jimmy Uso pinned (Reigns & The Usos)
Stats for 2016 (as of 25/05/16):
{Spoiler}1 Royal Rumble; 1 NC; 1 DQ; 1 PIN (1 Jimmy Uso)
So, in the span of his almost 3 years in the company he got pinned clean or clean-ish 4 times:
1. RAW 23/09/13 - it was an 11 on 3 handicap match, so numbers game and all that stuff; debatable
2. Elimination Chamber 2014 - no problem here
3. Wrestlemania 31 - the cash-in triple threat; debatable
4. Survivor Series 2015 - again Brouge Kick from behind and a cash-in; debatable
He lost, but was anyone of them clean as a whistle it's highly debatable.