The football world wants to see Lamar Jackson, and it got what it wanted when the rookie replaced Flacco late in the first quarter. The first impression he offered was nightmarish. Jackson’s first four passes fell incomplete. The Colts brought relentless pressure, trapping him in the pocket and leaving him with little room to maneuver. Then he seemed to lose a fumble on a scramble. But the fumble call was overturned via replay, and from there, slowly but surely, his night improved. He completed a pass, then another. Before halftime, he led the offense on a drive that produced a field goal.