D.C. United’s Brandon McDonald was suspended for one game and fined for his reckless challenge that endangered the safety of his opponent. McDonald tackled FC Dallas striker Blas Pérez from behind in the 20th minute of the match between FC Dallas and D.C. United.
Courtesy of MLS, here's video of the challenge in question:
The 26-year-old McDonald is a three-year veteran of the MLS and played in 29 games for United in 2011, with 2 goals and 29 fouls committed. McDonald came to D.C. in June of 2011 from San Jose for allocation money, and was then signed to a new contract (terms not disclosed).
Upon his signing by D.C., McDonald was touted for his toughness on the pitch. Coach Ben Olsen told the Washington Post in 2011 "[McDonald's] got a bit of nasty in him."