Quade finalized his bullpen on Saturday, naming Mateo to the last opening. The right-hander was called up last season for the first time, appearing in 21 games and posting a 5.82 ERA.
This winter, he pitched for Estrellas in the Dominican Republic and went 2-0 with a 2.40 ERA in 12 games.
Instead of designating one pitcher, Quade said he expects Russell, Mateo and Samardzija to be able to throw 40 pitches in a game and go at least two innings. Russell and Samardzija have both started in the past.
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The other pitchers in the 'pen -- Kerry Wood, Sean Marshall, and John Grabow -- will most likely be used for one inning or a specific situation.
"That's very manageable to me coming out of the chute," Quade said of the setup. "Barring something really going south, I think that works best."