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Analyzing the relationship of NFL couples

Today is Valentine’s Day, when the thoughts of young football fans turn to ... well ... more football.

Stats & Information looks at some NFL couples and lets you know who should stay together, who needs to rebuild their relationship and who might want to spend some time apart.

COUPLES WHO NEED TO STAY TOGETHER

Tom Brady and Wes Welker: Free-agent-to-be Welker has 672 receptions since joining the Patriots in 2007, the most for a player over any six-year span in NFL history.

Eli Manning and Victor Cruz: Cruz, who is slated to become a restricted free agent, has 168 receptions and 19 touchdowns over the last two seasons. Along with Hakeem Nicks, he gives Manning one of the game’s best deep threats in the league.

Matthew Stafford and Calvin Johnson: Johnson set an NFL single-season record with 1,964 receiving yards in 2012, while Stafford set an NFL record with 727 pass attempts. These two need to stay together if only to torture statisticians everywhere.

COUPLES WHO NEED TO REBUILD THEIR RELATIONSHIP

Tony Romo and Dez Bryant: Early in the season, they didn't appear to be on the same page, but Bryant caught a league-high 10 TD passes from Week 10 until the end of the season.

Aaron Rodgers and Jermichael Finley: Finley caught a career-high 61 balls in 2012, but just two went for touchdowns. At times it appeared that Rodgers had lost confidence in his tight end and reports have appeared that the Packers might release Finley.

Cam Newton and Steve Smith: Smith was critical of Newton's sideline demeanor last season, and he could have a point. When trailing in the fourth quarter over the last two seasons, Newton’s QBR of 35.9 is 35th among 45 qualifying quarterbacks.

COUPLES WHO MIGHT NEED TO SPEND SOME TIME APART

Mark Sanchez and Rex Ryan: After going to a pair of AFC Championship games in their first two seasons together, the relationship hasn't worked recently. Sanchez regressed even further in 2012, and has an NFL-high 52 turnovers over the last two seasons.

Alex Smith and Jim Harbaugh: Harbaugh has turned to the younger Colin Kaepernick. Since Kaepernick took over as the starter in Week 11, his 81.2 Total QBR is second to only Russell Wilson. Smith’s QBR of 54.1 since the start of 2011 is 19th among quarterbacks with at least 500 action plays.

Matt Cassel and Andy Reid: The Chiefs and Reid’s Eagles were tied with the Jets for the most turnovers in the NFL last season with 37. Cassel struggled with 19 turnovers in just nine games.