The Giants have a Trevor McDonald problem, and that’s not necessarily a bad thing. San Francisco’s young right-handed starting pitcher continues to impress at the major-league level, and might be forcing the team’s hand in some capacity. After another impressive outing (W, 6 2/3 IP, 5 H, ER, BB, 5 K) in the Giants’ 6-4 win over the Athletics on Saturday at Sutter Health Park, McDonald is proving himself to be a a very productive and consistent addition to a starting rotation that he might not have a spot in.However, San Francisco broadcaster Mike Krukow, believes he does. And should. “Well, there is a spot for him,” Krukow said Monday on KNBR 680’s “Murph & Markus.” “Not only do the Giants fans want him around, but everybody in the organization and that clubhouse wants him around … He brings confidence because of the way he goes about it. If you’re going out there and you’re a team and you have a guy on the mound who’s doing what Trevor McDonald is doing, you want him out there, you want him pitching for you, and it doesn’t matter who he’s facing.“Obviously, and if...