Was something wrong with Codi Heuer yesterday? He didn’t pitch on Friday. Marshall two days in a row against the same part of the lineup he faced on Friday is a pretty odd call unless literally no one else was available.
Also see how the extended outing for Hendricks Friday cascaded. Didn’t use Ruiz in the 9th yesterday when the lead got big, now Hendricks isn’t available on Saturday, now Bummer is saved for the 9th because you gotta have a classic closer, and in the end it becomes a loss.
Other ways that could have gone: 3-4-5 hitters are due up in the 8th, why not use your best reliever then? Or, Marshall clearly was in trouble when Upton came up, the game was tied but not lost, why not use Bummer there? Neither of those are options if your manager thinks your best available reliever must be saved for the 9th, but saving Bummer meant he never pitched.