UFC 191 start time, TV schedule, who is fighting tonight at 'Johnson vs Dodson 2'

After a week long hiatus, Ultimate Fighting Championship (UFC) brass have put together a pay-per-view (PPV) fiesta this evening (Sat., September 5, 2015) in Las Vegas, Nevada as the MGM Grand Garden Arena plays host to the UFC 191 mixed martial arts (MMA) card, featuring the Flyweight title fight rematch pitting Demetrious Johnson against John Dodson.

Catch all the action LIVE with a PPV main card start time of 10 p.m. ET (for up-to-date UFC 191 results click here).

Below is everything you need to know to stay on top of the PPV event in "Sin City."

Who: Demetrious Johnson vs. John Dodson
What: UFC 191
When: Sat., September 5, 2015, beginning at 7 p.m. ET on Fight Pass
Where: MGM Grand Garden Arena in Las Vegas, Nevada

How To Watch: Main card at 10 p.m ET on PPV; FOX Sports 1 "Prelims" under card at 8 p.m ET; and UFC Fight Pass early "Prelims" at 7 p.m. ET.

Live UFC 191 results: Play-by-play coverage stream right here

Why It Matters: Demetrious Johnson may very well be the best fighter on the planet, but recent wins over Kyoji Horiguchi, Chris Cariaso, and Ali Bagautinov hardly excited fight fans in terms of compelling and competitive matchups. While "Mighty Mouse" is still the hefty favorite in his rematch against John Dodson tonight, the UFC 191 main event is almost guaranteed to be a competitive bout between two of the best Flyweights in the world. This one is going to be a barnburner folks.

What's Hot: Other than the main event rematch, UFC brass has treated us to the ultra violent stylings of Anthony Johnson as he battles fellow striker Jimi Manuwa on the PPV card. On top of that, the co-main event will pit two former Heavyweight champs against one another as Andrei Arlovski and Frank Mir battle in a fight 10 years in the making. Did I mention Francisco Rivera is set to throw down against John Lineker, and Paul Felder takes on Ross Pearson for free on FOX Sports 1? This is going to be a fun night of fights ladies and gentleman.

What's Not: While Ronda Rousey and Conor McGregor continue to dominate headlines, UFC's Flyweight champion continues to fly under the radar while destroying his opponents in similar -- if not more impressive -- fashion. "Mighty Mouse" is arguably the best pound-for-pound fighter on the planet, and yet he can't sell PPV's partly because he weighs under 155 pounds. In three headlining PPV bouts, Johnson has failed to eclipse 250,000 buys, with his best numbers coming in at a paltry 205,000 for the stacked UFC 178 card. It's a shame casual fight fans refuse to give Johnson his due credit as one of the very best champions in UFC history, and it seems nothing can be done to make the 125-pound kingpin a PPV star.

Original Card vs Actual Card:

UFC 191 didn't go through many changes, although there were some minor injuries that caused UFC brass to shuffle the deck.

Anthony Johnson was initially slated to battle Jan Błachowicz on the PPV card, but UFC's head honchos opted to switch up the fight by placing Jimi Manuwa against the former No. 1 contender instead.

Błachowicz remained on the UFC 191 PPV, as he is now scheduled to fight The Ultimate Fighter (TUF) 19 winner, Corey Anderson.

Raquel Pennington was scheduled to take on Liz Carmouche tonight, but an injury to the former title challenger forced UFC brass to put Jessica Andrade in her place. Their battle on the "Prelims" will be a rematch from UFC 171, where Andrade won a split decision.

The final change to UFC 191 came when Andre Fili was forced out of his bout against Clay Collard, and replaced by Tiago Trator.

New Blood:

Joaquim Silva vs. Nazareno Malegarie: These UFC debutants will battle each other tonight on UFC Fight Pass. Silva is undefeated at 7-0, boasting four knockouts and three submission victories. As for Malegarie, he is much more seasoned at 23-3, having competed in Bellator four times. Both men have lauded jiu-jitsu games, with Malegarie earning 15 victories via submission.

How The "Prelims" Look: Expect violence!

The "Prelims" main event is a must watch as the always exciting Paul Felder returns to the cage to battle the venerable Ross Pearson. In what should be a sensational stand-up battle, expect someone to go to sleep.

As I previously mentioned, John Lineker and Francisco Rivera -- two of the hardest hitters sub-155 pounds -- will battle on free television as well. While casual fans may not know of either fighter all that well, "Cisco" and "Hands of Stone" should put on a hell of a show we won't soon forget.

As if those two fights alone weren't enough for a "Prelims" card, I'm intrigued to witness Joaquim Silva's debut, Clay Collard's return, and the Women's Bantamweight rematch between Raquel Pennington and Jessica Andrade.

Who Needs A Win Badly: This portion is reserved for fighters who could be fighting for their jobs today, rather than contenders or title challengers needing victory. Let's take a look at those who need to pull it together:

Joe Riggs (vs. Ron Stallings): "Diesel's" second UFC stint has gone far from planned, and if the MMA veteran hopes to keep his roster spot secure, he will need to turn things around in a big way this evening. Riggs has lost two straight, including a (technical) knockout loss to Ben Saunders due to a freak neck injury just 57 seconds into his Octagon return. Prior to that loss, Riggs accidentally shot himself in the hand, nearly ending his career altogether. If the TUF veteran can't defeat Stallings, it will likely mark the end of his UFC career.

Interest Level 6/10

I truly believe Demetrious Johnson is the most technical fighter in the world, and easily amongst the top five most exciting fighters to watch in the sport today.

Unfortunately for "Mighty Mouse," the fight game also requires the most successful to hype fights, predict victories, talk trash, and sell PPV's, and the Flyweight champ has been unable to do any of those.

To make matters worse, it seems UFC brass has all but given up in promoting the Flyweight champion. While Dodson has done his best to make this fight as intriguing as it could be outside of the cage, it seems the buyrate won't be much different from Johnson's last three outings.

With an outstanding main event casuals don't care about, a fighter embattled with domestic violence history and negative press on the PPV main card, and Corey Anderson vs Jan Blachowicz somehow slapped in the middle of a $60 event, UFC 191 gets a 6/10 score in my book.

Check out the full UFC 191 fight card right here:

UFC 191 PPV Main Event:

125 lbs.: Flyweight champion Demetrious Johnson vs. John Dodson

UFC 191 PPV Main Card (10 p.m. ET):

265 lbs.: Frank Mir vs. Andrei Arlovski
205 lbs.: Anthony Johnson vs. Jimi Manuwa
205 lbs.: Jan Blachowicz vs. Corey Anderson
115 lbs.: Paige VanZant vs. Alex Chambers

UFC 191 FOX Sports 1 "Prelims" (8 p.m. ET):

155 lbs.: Paul Felder vs. Ross Pearson
135 lbs.: John Lineker vs. Francisco Rivera
135 lbs.: Jessica Andrade vs. Raquel Pennington
145 lbs.: Clay Collard vs. Tiago Trator

UFC 191 Fight Pass "Prelims" (7 p.m. ET):

185 lbs.: Joe Riggs vs. Ron Stallings
155 lbs.: Nazareno Malegarie vs. Joaquim Silva

Remember that MMAmania.com will deliver LIVE round-by-round, blow-by-blow coverage of the entire UFC 191 fight card RIGHT HERE, starting with the Fight Pass "Prelims" matches online, which are scheduled to begin at 7 p.m. ET, and then the remaining under card balance on FOX Sports 1 at 8 p.m. ET before the PPV main card start time at 10 p.m. ET.

For more information on UFC 191, including the full fight card, results, news, and more, click here.