The Alliance of American Football had a fun Week 4 full of a lot of firsts in the league. The Iron suffered their first loss, while the Express and Legends both picked up their first wins. As a result, the Fleet and Hotshots each suffered surprising losses.

There are seven more weeks of AAF (plus the playoffs), which extend the season to April 27. After every week, we'll take a look at the results and rank each team based on performance.

MORE: 10 AAF Players who have made a case for the NFL

First, a look at the scores from Week 4:

— Express 26, Fleet 23

— Apollos 20, Stallions 11

— Commanders 12, Iron 11

— Legends 14, Hotshots 11

AAF Power Rankings

1. Orlando Apollos

The Apollos are the only undefeated team remaining after they picked up a tough road win in snowy Salt Lake City. It wasn't Orlando's most explosive performance of the season, but it was a good win in tough conditions. Garrett Gilbert continued to look like a star, completing 22 of 32 passes for 244 yards and a touchdown.

The MVP candidate QB now has a league-leading 1,071 passing yards on the season (next closest is 797) and has found a favorite target in Charles Johnson, who has a league-leading 410 receiving yards (next closest is 295).

In addition to the high-powered offense, Orlando has two players tied for second in the league in sacks (three) in Earl Okine and Andrew Ankrah. And among the eight AAF players with multiple interceptions, the Apollos have two in Terence Garvin and Keith Reaser.

Orlando is the complete package and has a real chance at running the table this season.

2. Birmingham Iron

Even though the Iron lost their first game of the season last week, they are still one of the tougher teams to beat. In fact, they nearly rallied at the end of the game and only fell one point short. The defense has been incredible, including a goal-line stand in Week 3 against the Commanders in which they stopped their opponent six straight times from the 1-yard line.

The only thing holding the Iron back is their offense, and those issues were made worse with a pair of injuries to offensive linemen in Week 3. Luis Perez looked awful as he completed less than half of his 39 pass attempts while throwing two interceptions. (He also still has no touchdowns on the season.)

Trent Richardson had one of his worst games of the season, rushing eight times for just 15 yards, although he did score his seventh touchdown. Backup Brandon Ross looked much better, running nine times for 64 yards (7.1 yards per carry), but BIrmingham started using him later in the game.

If the Iron turn to Ross instead of Richardson, maybe the offense can finally show some signs of life.

3. San Antonio Commanders

The Commanders have had an interesting season. They won in Week 1, lost two straight and then bounced back with a huge win against the Iron. Speaking of the Iron, they get a lot of credit for their defense, but San Antonio's effort shouldn't be ignored.

The Commanders have three players with at least 2.5 sacks and three players (out of eight in the league) with multiple interceptions. Their 14 combined team sacks leads the league, and the defense has helped a somewhat struggling offense.

Kenneth Farrow had a record-setting day in Week 4 with 142 rushing yards, but they can't expect that production every week.

4. San Diego Fleet

The Fleet jumped out to a 20-6 lead over the Express in Week 3 before QB Philip Nelson went down with injury. Replacing him was Alex Ross, who scored on a 30-yard bomb on his second pass attempt of the game. Ross, though, finished by completing eight of 18 passes for 80 yards and an interception while also fumbling twice.

With Nelson out of the game, the Express didn't have to worry about the QB play and could instead focus on league-leading rusher Ja'Quan Gardner, holding him to six yards on nine carries. Backup RB Terrell Watson found some success, going for 43 yards on 10 carries.

The Fleet are talented, but it's hard to win games when a team is down to a third-string QB who turned the ball over three times in just the second half. After the game, GM Dave Boller said the team was going to add another QB this week (Johnny Manziel, perhaps?) who can keep the ship afloat (pun intended).

5. Arizona Hotshots

The Hotshots losing to the Legends in Arizona is the biggest surprise of the AAF season so far. Atlanta looked terrible through the first three weeks, and Arizona was the betting favorite to win the league at the start of the season. Instead, Arizona has now dropped two straight after barely escaping with a win in Week 2 (a 20-18 win over Memphis).

Quarterback John Wolford has not lived up to the success he had in Week 1, but running back Jhurell Pressley looks like the real deal. He ran for 110 yards on 14 carries last week, placing him third in the league in rushing yards (266).

Arizona's defense is nothing special. It has forced only three turnovers with a league-low (tied) eight sacks.

6. Memphis Express

The Express are slowly climbing up our power rankings. After a shutout loss in Week 1, Memphis has been steadily improving into what ultimately led to the team's first AAF victory in Week 4. After finally benching Christian Hackenberg, the Express found some life on offense with Zach Mettenberger, who played well enough to secure a win.

But the real reason Memphis has played well has been its defense, which has forced nine turnovers. The Express got blown out in Week 1 but lost by just two points in Week 2, then lost to the Apollos by four in Week 3.

7. Salt Lake Stallions

The Stallions have played in close games (other than the first) but just can't put together wins. Their only victory came in Week 3, when Arizona's starting quarterback had to leave the game late. Their offense is mostly made up of Branden Oliver and Joel Bouagnon, who each place in the top seven in the league in rushing, but they're both averaging 3.9 yards per carry.

On defense, they have only forced two turnovers, and four of their nine team sacks have come from Karter Schult. There's just not much to be impressed with on this team.

8. Atlanta Legends

Congrats to the Legends on their first win of the season, but they're still last in our rankings. Even in victory, their game against the Hotshots was a disaster; they opened the game by scoring zero points on their first three trips to the red zone. On a positive note, the QB switch to Aaron Murray worked out, as he looked much more competent under center than Matt Simms had.

For starters, Murray didn't turn the ball over, but he also had an impact as a runner, leading the team with 54 rushing yards. The offense was actually able to move the ball, but at the end of the day, the Legends still only scored one touchdown.

Thankfully Atlanta has Younghoe Koo, who is now 8-of-8 on field goal attempts this season. The kicker could find his way back to an NFL roster in 2019.