Cattermole will go into Sunderland's squad for their Premier League opener against Bolton on Saturday.
Sunderland had Lee Cattermole and David Meyler sent off, while Matt Kilgallon volleyed against a post.
"It's been a long month really, lots of lonely times wondering and thinking, " Cattermole told BBC Newcastle.
But he will stay at the helm of English rugby's governing body, which accepted Cattermole's resignation "with regret".
The home side had already made one enforced change when they replaced the injured Sulley Muntari with Lee Cattermole.
Derby's Mile Sterjovski was forced out of the action after failing to recover from a no-holds barred challenge from Lee Cattermole.
John Cattermole, 54, from Shrewsbury, was held in April 2010, hours after reporting a break-in at the Monkmoor Hotel, which he ran.
Cattermole almost made it four on the stroke of half-time but his fierce strike from a neat Agbonlahor lay-off flew just over.
The open, end-to-end nature of the game continued after half-time and Lee Cattermole was soon booked for a reckless lunge on Nyron Nosworthy.
Cattermole appears to have lost a political battle which has resulted in the RFU council backing his alleged rival, chief executive Francis Baron.
United brought on Ole Gunnar Solskjaer, but it was Boro who next threatened as Lee Cattermole went agonisingly close with a powerful shot.
BBC: SPORT | Football | Premiership | Man Utd 1-1 Middlesbrough
Manchester United travel to Sunderland on Saturday, although Cattermole expects his team-mates to be ready for the test against Sir Alex Ferguson's side.
Bruce has made Cattermole his fifth summer signing following Darren Bent, Lorik Cana, Fraizer Campbell and Paulo Da Silva to the Stadium of Light.
The 26-year-old joins new signings Paulo da Silva, Lee Cattermole, Lorik Cana, Fraizer Campbell and Darren Bent at the Stadium of Light this summer.
Lee Cattermole collected in the Bolton half before sliding Bent in on goal and the striker made no mistake with a clinical finish past Jaaskelainen.
Boro's academy has unearthed several notable homegrown players in recent years, including England international Stewart Downing, and under-21 stars Andrew Taylor, Lee Cattermole and David Wheater.
BBC: SPORT | Football | My Club | Middlesbrough | Boro chief rejects Brooking claim
Sunderland were simply first to every loose ball, Lee Cattermole had no grievance against Spurs but he snapped at the heels of former Wigan team-mate Wilson Palacios throughout.
Despite that setback, Boro again started the second half positively with Johnson trying his luck with a long-range effort before being replaced by Lee Cattermole after 53 minutes.
BBC: SPORT | Football | Premiership | Middlesbrough 1-3 Aston Villa
Midfield strengthening has come in the shape of Wigan's Lee Cattermole and Marseille skipper Lorik Cana, while Paraguayan defender Paulo Da Silva has arrived from Mexican side Toluca.
Lee Cattermole was biting hard into tackles and Joey Barton had to be replaced by Danny Guthrie after a heavy challenge from the Wigan midfielder in the 15th minute.
Cattermole's dismissal was his second in five games at Sunderland this season, but with the public support of manager Steve Bruce, the Middlesbrough-born midfielder made his return in the 2-2 draw at Liverpool on Saturday.
With Michael Turner unavailable because of a four-match suspension, Sunderland boss Steve Bruce turned to Paulo da Silva to partner John Mensah in central defence, while captain Lorik Cana replaced the injured Lee Cattermole in midfield.
By that stage Cattermole had been given his marching orders for nasty-looking fouls on Dindane and Angelos Basinas but, in a rare attack, Sunderland almost doubled their lead when Kilgallon thundered a left-footed volley against the post.
If Bjarsmyr's absence was to blame for the second goal, England's third owed entirely to his presence as, in attempting to clear, his swinging left foot diverted an Onuoha header from Lee Cattermole's right-wing cross into his own net.
Since then a number of players the club brought through its academy such as Stewart Downing, Lee Cattermole, David Wheater and James Morrison have left, and Hasselbaink believes the club have paid the price for selling their home-grown stars.
Cattermole got his second yellow card and was sent off for a foul on Teemu Tainio five minutes from time and, as both sides pushed forward for a late winner, substitute Daryl Murphy failed to get enough on a header from six yards out.
Once such move saw summer signing Bent give them a seventh minute lead as he received a pass from the tireless Lee Cattermole and turned on the edge of the penalty area before shooting past Ben Foster for his seventh goal of the season.
The summer signing also hit the post in the second half before a furious row erupted between opposing managers Steve Bruce and Rafael Benitez, who clashed after Sunderland striker Kenwyne Jones had extensive treatment on the pitch before being stretchered off, like teammate Lee Cattermole was earlier.
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