The Celtics are not going to find one player to replace Gordon Hayward, but they are a little closer to adding a big forward who can score. Marcus Morris is hoping to get into the rotation this week after arriving late to training camp because of his legal matter in Arizona and then dealing with left knee soreness that cost him the club’s first three games. Brad Stevens said Morris will be reevaluated this week, but if he can participate in today’s practice, there is at least a chance that Morris could see time against the Knicks here tomorrow night. As one would expect, the Celts are being cautious. Their season plan was rocked when Hayward went down with a fractured tibia and dislocated ankle last Tuesday, but Morris is very much capable of increasing his expected role. While Hayward was an All-Star who averaged 21.9 points last season, Morris was far from a slouch in Detroit, going for 14 a game. And with the talent around him here, he could have even better looks at the bucket. But, to repeat, the C’s will be careful not to rush him.