Parker adds depth and experience to Spurs' squad.
Spurs—and manager Harry Redknapp, in particular—had been long-time admirers of the player.
Once West Ham were relegated at the end of last season, it seemed inevitable their best player in Parker would make a switch to stay in the Premier League.
For a time, it was believed Parker was only being considered as a potential replacement for want-away star midfielder Luka Modric. However, chairman Daniel Levy has continually rejected notions that Modric would move to Chelsea during this transfer window, turning down multiple offers from Tottenham's cross-town rivals.
Yesterday's news that Parker had handed in a transfer request at West Ham seemed to confirm there would be at least one deep-lying midfielder moving across London, regardless of Modric's situation. It remains to be seen if he is the only one, although Redknapp has stated he is "one million percent" certain Spurs' creative Croatian will stay put.
The 30-year-old Englishman brings experience to Spurs' squad at a time when they could use a guiding light. Following successive, heavy defeats to both sides of Manchester, the North London club are looking to swiftly turn their young season around.
Parker also provides valuable depth to a central midfield that has been decimated by injuries. Jermaine Jenas, Wilson Palacios and Brazilian phenom Sandro have all been out of action since the start of the season.
It is widely speculated that both Jenas and Palacios will be heading to the exits at White Hart Lane before the transfer window closes. Parker's signing will certainly add fuel to these rumors.
Parker joins goalkeeper Brad Friedel and on-loan striker Emmanuel Adebayor as Tottenham's major acquisitions during this transfer window. Spurs continue to be linked with Bolton defender Gary Cahill, with talks between the two clubs ongoing.