Nate Schierholtz, the every day starter?

Nate Schierholtz, Giants right fielder has been on fire recently both offensively and defensively, so why is he not in the lineup every day? The only reason I can think of is because of his sore right shoulder from a driving catch he made during a game against the Dodgers. But, we clearly saw that did not influence his two great plays today in the game versus the Cardinals. Today, he got an RBI that tied the game and got the go ahead run to win the game in the 11th inning. If he were not in the lineup today Giants would of potentially lost the game. Schierholtz needs to be in the starting lineup every day, he is key to our lineup. In Colorado we all saw how he shot those home runs out of the field. Not only has he been hitting extremely well but also been playing amazing defense. Whenever the Giants need a play to happen, he is always there to make it possible wither it being a diving catch or throwing a runner out on the base path. He has one of the strongest arms in the team, Posey would of had Cousins out with the throw Schierholtz made but due to the collision that was not possible. Currently Schierholtz has been an amazing overall player, which is why I think he should be in the every day lineup.