2012 NBA power rankings: Celtics slide one spot to No. 12

After starting the week with a thrilling overtime victory, the Boston Celtics have dropped their last two games. The Celtics are now just one game above .500 at 12-11 on the season.

The consecutive losses knocked the Celtics down one spot, to No. 12, in this week's SB Nation NBA power rankings. Along with the No. 12 ranking, Seth Rosenthal wrote:

Boston had been defending pretty solidly until they crapped on that end -- both in the paint and behind the arc -- in a couple weary defeats in Houston and San Antonio.

The Celtics began the week with a 117-115 victory over the Dallas Mavericks at home but then struggled after heading out on the road. On both Friday and Saturday, the Celtics gave up more than 100 points while failing to score more than 90. Friday was a 101-89 loss to James Harden and the Houston Rockets and Saturday they fell 103-88 to the San Antonio Spurs.

Boston's road trip comes to an end on Tuesday night when the Celtics face the Chicago Bulls at 8 p.m. ET.