Sam Dyson should be excellent again, unless he’s a trainwreck, but he’ll probably be excellent

Sam Dyson’s presence on the roster as an effective reliever is a credit to the Giants. He was a big part of the Rangers’ bullpen in 2015, when they won the AL West, and a legitimately excellent closer in 2016, and yet just two months in to 2017, his season was such a nightmare — and we’re talking a shadowy figure chasing you while you’re naked into your math class where you have a test you didn’t know about and your teacher is a giant spider in clown makeup who makes your teeth fall out — that Texas designated him for assignment.

The Giants claimed Dyson off waivers, worked out a trade with the Rangers, and then got to work. His ERA with Texas that year was 10.80 and his FIP was 9.16; with…