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Building depth as the Fantasy football playoffs approach is important, and some notable players are appearing on the radar in time for the postseason push. New York Jets wide receiver Denzel Mims averaged nearly 24 yards per catch on Sunday. Should Mims be your No. 1 choice above all other Week 12 NFL Fantasy Football waiver wire targets? Seattle Seahawks running back Rashaad Penny may return from a knee injury very soon. 

Should Penny be one of your top Week 12 Fantasy Football waiver wire targets? Which players on Fantasy football waivers are worth grabbing? Before determining your Week 12 Fantasy football waiver wire strategy, be sure to see what SportsLine's resident Hall of Famer, Scott Engel, has to say.

Engel is an inaugural member of the Fantasy Sports Writers Association's Hall of Fame. He is a four-time FSWA Award Winner and nine-time finalist, and has pulled off a three-peat in his prestigious New York City Fantasy Football League that includes other experts and high-stakes players. 

Engel is 103-60-2 in his seasonal Fantasy football leagues after 11 weeks. This season, he was all over Justin HerbertMike Davis and Tim Patrick as recommended adds in advance of their breakthrough performances. He also tipped Fantasy players off to Carlos Hyde as an emergency option. 

Now, he's revealed the best widely available Fantasy football free agents entering Week 12. You can see his top Fantasy NFL waiver wire picks and full analysis over at SportsLine

Top Fantasy football waiver wire picks for Week 12

One player Engel is advising Fantasy players to target on the Week 12 waiver wire: San Francisco 49ers tight end Jordan Reed. Many Fantasy players need to solve their problem at tight end before the playoffs start. Unless you have one of the top-tier tight ends on your roster (Travis Kelce, Darren Waller, Mark Andrews. T.J. Hockenson) you have been frustrated with your options and have tried different players at the position without much consistent success. 

Engel says Reed could be the solution to the tight end problem that has plagued your team for most of the season. He is still widely available in many Fantasy football leagues because he went largely unclaimed during San Francisco's Week 11 bye.

Many Fantasy players make the mistake of dropping or not claiming players when they are on byes, and now you can take advantage of that error by putting in a waiver claim for Reed. With George Kittle (foot) out, Reed should be the No. 1 tight end target in the 49ers offense until further notice. 

Even when Kittle is not in the mix, the tight end position remains a key element in the San Francisco offense. Reed caught five passes for 62 yards in Week 9 vs. New Orleans. He also scored two TDs in a game earlier this season while filling in for an injured Kittle. While Reed does have a long and very detailed history of injuries, you have to add and start him while he is available. 

Another waiver wire target Engel is all over entering Week 12: Minnesota Vikings running back Alexander Mattison. He is still available in many leagues, and could instantly become a quality starting option in an instant during the Fantasy playoffs. Dalvin Cook is one of the elite running backs in Fantasy football, but his injury history is well-documented. Mattison could be asked to start for Minnesota at any time in the upcoming weeks, so he should be on your bench in case he gets the call. 

Cook already missed a game this season with a groin injury, and has never played a full season in his career so far. It is very important to have players on your roster that can step in and start for you during the Fantasy postseason. Mattison is a prime example. He rushed for 112 yards in relief of Cook in the second half of the Vikings' Week 5 game, and is one of the better No. 2 running backs in the NFL

How to set your Week 12 waiver wire claims

Engel is also all-in on a wide receiver who should be an immediate add. This player is still widely available and could be a huge boost to your Fantasy football lineup moving forward. You can only see who it is at SportsLine

So which players should you target on the Fantasy football waiver wire before Week 12? And which wide receiver is a must-add? Visit SportsLine now to see the best league-winning Fantasy football free agents entering Week 12, all from a Fantasy Hall of Famer, and find out.