The Warriors had an optional shooting practice Sunday at the Air Canada Centre.

When they play there against the Toronto Raptors on Monday, rebounding will be mandatory.

"We know who we are, and we know what we have to do to win ballgames," Warriors head coach Mark Jackson said. "Somehow, with a lack of size on the floor at times, we've found a way to be very successful during the course of the season. It's a fact that we can get it done.

"When we don't, it's not due to a lack of size. It's because of a lack of effort and commitment."

When Jackson reviewed the video of the Warriors' past two games - consecutive losses in which they were manhandled by Chicago and Milwaukee - he must have had trouble identifying the team wearing the Golden State jerseys.

The group that has withstood the absence of big man Andrew Bogut for most of the season with heaping helpings of grit, guile and gumption suddenly has become nothing short of feeble:

-- The Warriors have allowed consecutive opponents to corral at least 16 offensive rebounds. Only four of their first 41 opponents had done that.

-- The Warriors have allowed consecutive opponents to grab at least 56 rebounds. Only two of their first 41 opponents had done that.

-- The Warriors have allowed consecutive opponents to score at least 27 second-chance points. Only two of their first 41 opponents had done that.

David Lee has averaged 17.5 points a game during the two-game skid while shooting 36.4 percent from the floor. The All-Star forward had only 12 games in the first half of the season in which he shot less than 50 percent and seven in which he shot 40 percent or worse.

Read more: http://www.sfgate.com/warriors/article/To-rebound-Warriors-need-to-rebound-4227725.php#ixzz2JHnLolXi