It has been six months since the Yankees edged the Baltimore Orioles in the American League division series, although in many respects, for the winners, it has felt like six awfully long years.

The team is slowly returning to full health, in piecemeal fashion, and only one player (Robinson Cano) who started in last season’s Game 5 for the Yankees in the A.L.D.S. was in the lineup Sunday night.

But with this cast of fill-ins — a Band-Aid unit in a patchwork lineup — the Yankees have managed to stay above .500 through the first 11 games of the season, at 6-5. The offense has looked reliable, just productive enough. And with a 3-0 win over the Orioles at Yankee Stadium, they showed they could still pitch the way they did in early October.

Baltimore returned largely the same lineup from their postseason run, which ended on a damp and windswept afternoon with a shutdown performance from the Yankees ace C. C. Sabathia. The result Sunday — if not the temperature, which was chillier — was remarkably reminiscent.