Pagan was optioned to Triple-A Tacoma on Saturday, the Tacoma News Tribune's Bob Dutton reports.
Dan Altavilla and Rob Whalen were recalled from Triple-A as corresponding moves. Pagan gave up five runs in 2.2 innings with the big club, but he also notched 18 strikeouts in 11 innings with Tacoma earlier this year, so he has intriguing strikeout potential.