<p>MESA, Ariz. -- Cubs shortstop Starlin Castro, sidelined since Sunday with a mild right hamstring strain, hopes to begin baseball activities early next week, and has the same goal as years past of playing all 162 games.</p><p>Castro, injured when he tried to steal second base in a game, is taking advantage of the Cubs' new hydrotherapy pool and doing exercises there twice a day. It's helped speed up his rehab.</p><p>"I don't feel any hurt or tightness," Castro said Friday. "It feels much better. I don't want to rush myself. I want to be 100 percent."</p><p>His goal every season is to play every game, which he did in 2012. Last year, Castro had a strained left hamstring in Spring Training, recovered and played 161 games.</p><p><a href="http://mlb.mlb.com/news/article.jsp?ymd=20140307&content_id=68879080&notebook_id=68878884&vkey=notebook_chc&c_id=chc">Keep reading...</a></p>