The Miami Marlins are expected to designate first baseman Matt Mervis and second baseman Ronny Simon for assignment prior to their contest on Friday against the San Francisco Giants. The Marlins acquired Mervis from the Cubs in the winter. While he showed solid power upside during his first 23 games, posting a .534 SLG with an .827 OPS, since May 1, Mervis has held a low .111/.200/.156 slash line with just two extra-base hits. Simon joined the MLB roster in late April when Griffin Conine hit the injured list. Through 19 games this season, Simon has posted a modest .234/.327/.277 slash line with two doubles and no home runs. With both Mervis and Simon likely exiting the roster, fantasy managers should expect Eric Wagaman to see most of the time at first base while Javier Sanoja continues to fill in for the injured Xavier Edwards (back) at the keystone.