Let's see, we've tossed out a handful of names, but it might help to define the role and attributes necessary to play within that role...
I believe the consensus here is for a SILB/Mike with the presumption that Mayo stays at the Jack/WILB? Guyton is a comfortable #3 ILB who may be able to win the starting gig in Training Camp? Bruschi is now a two-down situational field-coach who we'd like to see lined up at second string with a rookie to groom?
So...
-- ILBs are expected to primarily play off the LOS, covering the A & B gaps on their side of the formation.
-- They need to be able to stack & shed blockers (OL, FB, H-back, TE, and slot WR) to close the running lane for their gaps and tackle the ball carrier.
-- They need to cover the short and medium zones on passing plays.
-- They should be able to blitz.
-- They should be great in trash.
-- They should be able to get to the outside on their side of the formation against outside runs.
-- They should be wicked football smaht.
-- Workaholic film/gym rats.
-- Instinctive, an absolute nose for the ball.
Prototype "starting" NE ILB in the BB era is 6'1" - 6'4", 242-260 (used to be 245-260 before Mayo, and probably will be again after the offseason program).
Some excerpts from NFL Draft Scout profiles:
Mayo
-- Productive open-field tackler and playmaker who is a strong presence in the huddle, playing with good aggression taking on lead blockers.
-- Shows functional strength at the point of attack, taking on the lineman or fullback with aggression...
---- ...does struggle some vs. double teams.
-- Smart athlete who calls defensive signals...
--- ...doing a nice job of staying on his feet.
-- Knows how to avoid blocks while maintaining balance on the move.
-- Does the extra film work needed to prepare for games and has no problem taking plays from the chalkboard to the playing field.
-- Can adjust on the move and is quick to read and react to keys (sees the big picture and works hard to get to the ball).
-- Can avoid trash on his way to cut off the ballcarrier.
-- Gets good zone drops due to his hip flexibility, showing the quick feet to fluidly turn and stay tight on his man in pass coverage.
-- His ability tracking the ball in flight stands out on film.
---- Not stout enough to stack and control in tight areas, as he does not keep his hands active enough to handle double teams.
-- Showed improved hand usage as a junior...
---- must do a better job of extending his arms to defeat cut blocks.
---- Needs to finish better as a tackler, as he is more finesse than he is a physical hitter.
---- Needs to step up and plug the holes at the line of scrimmage and seems a little slow to scrape downhill.
---- Better suited for a defensive system that will allow him to cover up, read and move, rather than one that requires Mayo step up and plug holes at the line.
---- Must be more aggressive using his hands to get into the blocker's chest, as the opponent can lock on and push him around at times.
Guyton
-- Has adequate strength to take on blocks and fill the rush lanes, flashing the speed to close in a hurry once he locates the ball.
-- Demonstrates functional strength to control blockers and is able to hold his ground at the line of scrimmage to plug run lanes.
-- Exhibits good mental alertness, as he learns well and shows adequate awareness and alertness in his play to diagnose and track the ball.
-- Has adequate instincts, feel and awareness to diagnose run and pass plays when working through trash.
-- Able to break down and bring ballcarriers down effectively on inside and outside run patterns.
-- When playing vs. the inside run, he has the functional strength to stack and fill...
---- ...needs time to diagnose, as he is not always good at reading blocking schemes.
-- Has enough strength to hold off or control linemen and has long arms to create and maintain separation.
-- His long arms, strength and use of hands help him to hold his ground vs. tight ends and control the line of scrimmage.
-- As a blitzer/rusher he possesses some feel and timing, and can make the turn, demonstrating a good burst to close.
-- In zone coverage, he exhibits adequate foot quickness and change of direction to transition and break on routes.
-- Has learned how to use his long reach to fend off blockers and keep the opponent away from his body.
-- Solid wrap-up tackler with the hand strength to secure on his initial contact.
----A bit hesitant reading keys at times...
---- ...is not the most instinctive player when it comes to diagnosing the run/pass plays.
---- Not real active with his hands and he tends to get caught up in traffic when trying to flow to the ball.
Ruud
-- Quick to key and diagnose the play...
-- ...is active vs. the run, showing the functional strength to take on blockers and the hand usage to shed blocks.
-- Instinctive player with good vision...
-- ...shows good tackling form...
-- ...using his hands effectively to take on, shed blocks and make the play.
-- Opens his hips properly and is fluid in his pass drops, staying low in his turn-and-go action.
-- ...he can sift through trash quickly.
---- ...needs to improve his strength to be more effective with his inside gap responsibilities.
-- His vision and awareness let him get a good jump on the ball and he does a decent job breaking down in space.
-- Takes good angles.
---- Will lose leverage on inside run plays when he leads with the wrong shoulder.
---- His lack of bulk causes him to get engulfed by the larger blockers and while he needs to add more weight, it could impact his timed speed.
---- ...needs to play under control more, as he tends to over pursue.
On paper, and with the help of one season, the team of Mayo, Guyton, and Ruud reads like a potentially good fit for NE's ILBs.
- All need to get stronger and add some more muscle mass (in progress).
- The two "drafted" players are described as "instinctive"...must be something BB wants to see in his LBs.
- The undrafted player has "adequate" instincts (Ochmed and I have discussed this in the past, I believe you can develop your instincts with hard work and study, "adequate" earned Guyton a chance and he ran with it).
- The drafted kids showed better ability to get through trash.
- All showed the ability to engage and shed blockers - they didn't just run around them everytime.
- They all make the tackle, but don't always deliver the big hit.
- They all were decent in coverage.
Their flaws are correctible, but the keys here are instinctive, good in trash, and willing to engage and shed blockers.