Obafemi Martins will spend at least three weeks on the sidelines after picking up a groin injury earlier in the week a Cup tie against Portland Timbers. <br /><br />The Seattle Sounders number nine has undergone an MRI scan and the result show that he will spend three - six weeks on the treatment table.<br /><br />&ldquo;It doesn&rsquo;t require surgery. So that&rsquo;s a positive situation. But we&rsquo;ve got to see how many weeks he will be out of action).&rdquo;coach Sigi Schmid told the media after training on Thursday.<br /><br />&ldquo;So the window is similar. Between three and six weeks, we&rsquo;d expect.&rdquo;<br /><br />If we take a positive approach and use three weeks as the base, Obafemi Martins will be unavailable for selection for games against SJ Earthquakes, Philadelphia Union , Portland Timbers and DC United in the MLS.<br /><br />The 30 - year - old former Nigeria international has scored 8 goals in all competitions this term. <br /><br />Photo Credit : mlssoccer.com<br />