Before much time passed, the Twitter followers for Lane and his blog, Celtics Sentinel, joined in on his mission. So did complete strangers. They repeatedly sent the message to Celtics players, hoping at least one of them would find Carson’s story and respond. Smart did first. After losing his own mother, Camellia, to cancer two years ago, he could sympathize with Carson. “I know the feeling of losing a mom,” Smart said. “He’s a lot younger than I was. I was already older, so for me, it was a little more comprehendible. I can only imagine what he’s thinking, what’s going through his mind. He’s a little kid. He misses his mom. So for me, losing a loved one, especially a mother, sits home with you.”