Riley said Monday that he thinks bringing back now-former free agents Dion Waiters and James Johnson and signing them to four-year deals, combined with the surprise addition of Kelly Olynyk, gives Miami a real shot at picking up where it left off last season. "I think in training camp, they have to look at it with great foresight for the future — but also they have to back up their words somewhat with their play," Riley said. [...] it'll be very interesting this year when we go to training camp to see where their heads are, and I'm convinced they'll come ready. The Heat went through one of the most unusual seasons in NBA history last year — it lost franchise cornerstone Dwyane Wade in the summer, started 11-30 to fall close to the NBA basement, then went 30-11 in the second half and still missed the playoffs. The Heat are still talking with forward Luke Babbitt about a return, plus have been in discussions with captain Udonis Haslem — who has been approached by other clubs, including Cleveland, to gauge his interest in lending his expertise elsewhere. Plan B was, if Hayward decided to play elsewhere (and he did, picking Boston), to go all-in on retaining Heat...