ANAHEIM — The Angels came to Victor Mederos this spring with a radical suggestion.

They wanted to change his arm angle, which would also lead to significant changes in the types of pitches he could throw and the way he threw them.

“It’s a huge change,” Mederos recalled being told. “Your whole arsenal is going to change.”

Mederos said he did not hesitate.

“I’m here for it,” Mederos answered, describing the spring training conversation a day after his first major league start. “I’m here to do anything that’s going to make me better.”

At this point, Mederos has a decent sample of minor-league performance to suggest that he is going to be better. In the big leagues, he’s allowed five runs in eight innings, including three in four innings against the Dodgers on Tuesday night .

The start

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