Scott Engel is in his eighth season of providing Fantasy Football coverage for Seahawks.com. An inaugural member of the Fantasy Sports Writers Association's Hall of Fame, he is in his 23rd year as a Fantasy analyst and professional. You can now find more of his work and weekly rankings on RotoBaller.com and hear him every Saturday night on SiriusXM Fantasy Sports Radio.

As Seahawks fans well know, Pete Carroll has a "Next Man Up" philosophy. He trusts his players to step forward and perform well when they are needed to take on expanded roles. Having quality depth on an NFL roster is essential to success. The same approach should also be applied to Fantasy Football during your playoffs. You must have good depth in case injuries strike. Those who rostered Le'Veon Bell and Josh Jacobs were reminded of the need for reserves they can confidently turn to when it is necessary.

At this very late point of the Fantasy Football season, it's important to have immediate insurance types on your rosters. If you don't have the top NFL backup to your best running backs, you need to add them now. This preventive measure will serve you well in case of an injury. You won't have to simply hope you land that guy who moves into a starting role on the waiver wire. He'll already be on your roster and ready to contribute to your playoff run.

This approach can also apply to wide receivers who may be needed to step forward in case of injuries to a top starter. Plus, in the Fantasy playoffs, with no bye weeks left and no time to roster players in hopes of future success, you can always make a move to "block" your opponent on the waiver wire. If you see an upcoming opponent with a hole on his roster created by a recent injury, grab that "Next Man Up" off free agency ahead of him if you can. Do whatever you can to win and advance to the Fantasy Super Bowl next week.

Here are some more pressing additions for the upcoming week.

Week 15 Fantasy Football Waiver Wire Targets

Running Backs

DeAndre Washington, Raiders (0.2 percent owned in NFL.com leagues): Operating as the lead RB in place of an injured Josh Jacobs, Washington rushed for 53 yards and a TD, and caught six passes for 43 yards in Week 14. That's a well-rounded Fantasy performance from a versatile RB. Jacobs has a fractured shoulder, so Washington may deserve strong flex consideration in Week 15.

Boston Scott, Eagles (0.1): Scott came through when the Eagles needed an offensive jolt in their important comeback win over the Giants on Monday Night. Scott injected some extra life into the offense, rushing for 59 yards and a TD and catching six passes for 69 yards. After he contributed at such a crucial time for Philadelphia, Scott may be in line for more important work going forward. He does have some flex potential for the rest of the Fantasy playoffs.

C.J. Prosise, Seahawks (0.1): We have preached about having quality depth for your playoffs, and Prosise fits the bill as an essential Fantasy handcuff now. Prosise has already contributed in the past as a dual threat performer in terms of receiving and rushing. Make the smart play to roster Prosise now for potential Fantasy usage at any time.

Wide Receivers

A.J. Brown, Titans (12.6): He was the second-highest scoring Fantasy WR of Week 14, with 33.60 points on NFL.com, the highest total of his rookie season so far. Brown is part of a very impressive crew of rookie WRs this season that also includes DK Metcalf. He is only improving as the season progresses, and the surging Titans make a playoff push. Brown knows how to position himself well for possession catches, and in a nod to longtime Seahawks followers, he has tremendous open field gears reminiscent of a young Joey Galloway.

Breshad Perriman, Buccaneers (0.1): As an example of why you should also consider the "Next Man Up" handcuff approach to rostering WR depth where it makes sense, Perriman now gets to take on a larger role in one of the league's most potent passing games. Mike Evans may not play again this season. Perriman has totaled 29.70 points on NFL.com in his past two games.

Russell Gage, Falcons (0.4): Gage scored over 31 Fantasy points in Weeks 12 and 13 and now must step forward to be a more consistent target for Matt Ryan with Calvin Ridley out for the season. Gage has already shown he can produce when called on, and Julio Jones drawing a lot of defensive attention can only help him draw frequent targets.

Tight Ends

Tyler Higbee, Rams (26.3): He is coming off a pair of seven-catch, 100-yard games and has recently emerged as a top option for Jared Goff. Higbee has a good chance to continue his perform well as opposing defenses focus heavily on other notable weapons in the Rams offense.

Ian Thomas, Panthers (0.3): He caught five passes for 57 yards and a TD, and will be needed to play more of a key role in the Carolina passing game with Greg Olsen out. The second-year man has the look of a trustworthy target for Kyle Allen.

Quarterback

Ryan Tannehill, Titans (29.7): If you still don't feel quite comfortable about your Fantasy QB situation, you need to add Tannehill now. His 27.51 Fantasy points last week were a season high, and he must be considered a strong Fantasy starter for the rest of your playoffs. Tannehill can be a Fantasy difference-maker in the next two weeks, so at least add him so your opponents cannot do so.

Seahawks Fantasy Mailbag

For answers to your Fantasy questions early every week,fill out the bottom of this form on Sunday nights or early Mondays for priority consideration. You can also tag @scottetheking and @Seahawks on Twitter.

Howard Silversmith asks: Who should I start this week between Ryan Tannehill, Baker Mayfield and Ryan Fitzpatrick?

Engel: All three of those passers have good matchups, but as already outlined, Tannehill is playing like a Fantasy QB1 recently. It is a very important game for him against the Texans, and Tannehill has to be locked in over those less reliable alternatives.

Arron Gregory asks: I am going into my playoffs with Kyler Murray and Carson Wentz at QB. Would you prefer Tannehill over those guys?

Engel: Murray could bounce back this week against Cleveland, and Wentz has another must-win vs. Washington. But I would prefer to roster Tannehill and back him up with the dual threat ability of Murray. Let's also note the Texans have allowed the third-most Fantasy Points Per Game to QBs over the past month.

Scott (jeepnewbie on Twitter) asks: I lost Mike Evans and John Brown and Tyler Boyd have tough matchups this week (Pittsburgh and New England, respectively). Golden Tate, A.J. Brown, Breshad Perriman and Anthony Miller are on waivers. Who do I try to add?

Engel: Tate is a must-add as he faces Miami, and he has been a mostly consistent Fantasy producer this season. Brown has a lot of upside against Houston, but I slightly prefer Perriman vs. Detroit. He plays in a higher volume passing game than Brown. Miller is a good add, too, but Tate is the best pickup in terms of being safe, and Perriman is in the best offensive situation. You should start both of them if you can get them, otherwise at least add Tate and use him over Boyd.

Mister Greyman on Twitter asks: In a superflex league, which two start between Drew Brees, Matt Ryan and Russell Wilson?

Engel: Those are all fine Fantasy QB options, but with Ryan facing a 49ers defense that should bounce back to its better form, I would easily go with Brees vs. Indianapolis and Wilson vs. Carolina.

For more from Scott Engel, get the RotoBaller.com 2019 Fantasy Football Package, which includes his lineup rankings and regular weekly columns. Enter code "Seahawks" at checkout for a discount. The price has already been slashed for your Fantasy Football playoff push.