The <a href="https://en.wikipedia.org/wiki/Philadelphia_Eagles" id="mwng" rel="mw:WikiLink" title="Philadelphia Eagles">Philadelphia Eagles</a> and <a href="https://en.wikipedia.org/wiki/Pittsburgh_Steelers" id="mwnw" rel="mw:WikiLink" title="Pittsburgh Steelers">Pittsburgh Steelers</a> of the <a class="mw-redirect" href="https://en.wikipedia.org/wiki/NFL" id="mwoA" rel="mw:WikiLink" title="NFL">NFL</a> <a href="https://en.wikipedia.org/wiki/Steagles" id="mwoQ" rel="mw:WikiLink" title="Steagles">merge for one season</a> due to player shortages caused by World War II.