Coming off a Super Bowl appearance in 2019, the San Francisco 49ers have been extremely inconsistent this season. Through six games, they are 3-3 and hanging around in the NFC West.

San Francisco began the season with a loss to the Arizona Cardinals. They went on to dominate the two New York teams before being upset by the Philadelphia Eagles. The lowest point of the season thus far came when the 49ers were dominated 43-17 by the Miami Dolphins. When the season was trending downhill, they picked up a huge win over the Los Angeles Rams on Sunday night in Week 6.

Injuries have played a huge factor in the 49ers’ season. Nick Bosa suffered a torn ACL and is out for the remainder of the season. Key offensive players like Jimmy Garoppolo, Deebo Samuel, and Raheem Mostert have missed time with different injuries.

As the trade deadline approaches, San Francisco could look to add some pieces to make up for the injuries. Here are four options they could pursue in a trade.

4. Derek Rivers

The loss of Bosa is something that hurts and is hard to replace. Dee Ford is also out with a back injury. San Francisco has had some players step up, but they could look to add another edge rusher at the deadline.

This is where Rivers comes into play. He has not been a huge impact player out of Youngstown State, but he could be a depth piece for the 49ers. Rivers has not been used as a regular for the New England Patriots. With the current state of the 49ers at the position, Rivers would be a nice supplemental piece.

The Niners’ defense is their strong suit. It is what led them to the Super Bowl last season and what they will have to lean on once again in 2020. Whether it is Rivers or another option, the 49ers could look to add some depth at edge rusher.

3. John Ross

The Bengals could be looking to trade a wide receiver at the deadline. A.J. Green is the big name on the market, but it could end up being Ross that gets dealt.

The 49ers have been looking for help at wide receiver for years. They made a deal for Emmanuel Sanders last season before letting him walk in free agency. Ross has not been able to stay healthy over the course of his career.

Cincinnati could try and get something in return for their speedster given his age at 26 years old. Ross played 13 games in 2018 and scored seven touchdowns, but has been inconsistent ever since.

This is a low level deal for the 49ers, but it would add another piece on the outside. In an offense with Shanahan, Ross could try to resurrect his career.

2. Ryan Kerrigan

This is Kerrigan’s 10th year in the league and they have all been spent in Washington. He is the franchise’s all-time sack leader with 93. Kerrigan has plenty left in the tank and he is showing it this season with three sacks in a limited role.

Kerrigan is splitting time on the edge with No. 2 overall pick Chase Young and Montez Sweat. Washington is full of first rounders along the defensive line and Kerrigan is another one from back in 2010.

He has been linked to teams like the Baltimore Ravens, but they just added Yannick Ngakoue from the Minnesota Vikings. Kerrigan would add experience and veteran leadership to this defense.

During his time in Washington, Kerrigan has missed just four games and has shown passion on the field. He is a true leader and difference maker on the edge. That is something that the 49ers need if they want to make another long run in the postseason.

1. Alex Mack

Mack and Kyle Shanahan have ties from the Atlanta days and a reunion might be coming in the future. The 49ers could use a center and the Falcons might be sellers come the trade deadline.

After a 1-5 start, the Falcons could be looking to unload some players. At age 34, Mack has some time left in his career, but might want to play for a contender. Mack is a free agent in 2021 and will carry a $10.6 million cap hit.

Weston Richburg is still on injured reserve because of a knee injury suffered last season. This is a situation where Mack would improve the offensive line and would be a cheap option to bring back in free agency in a year.

San Francisco already made a deal along the offensive line when they acquired Trent Williams from Washington. They could add another veteran and completely shore up the line as we enter the middle of the regular season.