Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Month | Week | Overall | Offensive | Defensive | Transition | Rookie |
| --- | --- | --- | --- | --- | --- | --- |
| January | 1.0 | Josh Sanderson | Josh Sanderson | Pat O'Toole | Paul Rabil | Garrett Billings |
| January | 2.0 | Colin Doyle | Colin Doyle | Brandon Miller | Bobby McBride | Ilija Gajic |
| January | 3.0 | Bob Watson | Lewis Ratcliff | Bob Watson | Paul Rabil | Garrett Billings |
| January | 4.0 | Aaron Bold | Jeff Zywicki | Greg Peyser | Brodie Merrill | Brett Mydske |
| February | 5.0 | Blaine Manning | Blaine Manning | Matt Vinc | Peter Morgan | Stephan LeBlanc |
| February | 6.0 | Mike Poulin | John Tavares | Angus Goodleaf | Jay Thorimbert | Stephan LeBlanc |
| February | 7.0 | Callum Crawford | Ryan Powell | Pat O'Toole | Steve Toll | Garrett Billings |
| March | 8.0 | Casey Powell | Casey Powell | Matt Vinc | Geoff Snider | Alex Gajic |
| March | 9.0 | Mark Steenhuis | Mark Steenhuis | Matt King | Jeff Shattler | Kyle Clancy |
| March | 10.0 | John Tavares | John Tavares | Matt Vinc | Jordan Hall | Alex Gajic |
| March | 11.0 | Dan Dawson | Dan Dawson | Anthony Cosmo | Jeff Shattler | Ryan Hotaling |
| March | 12.0 | Lewis Ratcliff | Lewis Ratcliff | Brandon Miller | Paul Rabil | Alex Gajic |
| April | 13.0 | Stephan LeBlanc | Callum Crawford | Brandon Atherton | Brodie Merrill | Stephan LeBlanc |
| April | 14.0 | Shawn Williams | Rhys Duch | Matt Roik | Jed Prossner | Chris Corbeil |
| April | 15.0 | Dan Dawson | Dan Dawson | Matt Vinc | Geoff Snider | Stephan LeBlanc |
Question:
Name the rookie for ryan powell
Answer:
Garrett Billings