Robertson had been pitching for the Newark Bears of the Atlantic League. He had no record after two starts, striking out 15 in 12 scoreless innings. Robertson, 29, made eight relief appearances with Indians in 2004 and later was traded to the Expos. He pitched for Reds' Triple-A Louisville affiliate last season and produced a 5-11 record and 5.46 ERA.
Miked: With the big-league team down three starting pitchers, the Mets can't help but to look at the performances of Mike Pelfrey through a prism different from the one they used when he made his first professional start last month. Pelfrey made his third start for the Mets' Double-A Binghamton affiliate Tuesday night and, for the second time, he pitched effectively. For the third time, he wasn't involved in the decision.
In what was his longest appearance of the three, he pitched seven innings against the Connecticut Defenders, the Giants' affiliate, and allowed seven hits, two walks and three runs -- two of them earned. He struck out 10. Binghamton scored six runs in the ninth inning to win, 8-3.
Pelfrey's numbers to date include a 0-0 record and 3.78 ERA in 16 2/3 innings. He has allowed 23 hits and five walks and struck out 21.
Even though little of a telling nature is said about Pelfrey these days, he is a topic conversation more than he was.
"You keep an eye on him because he's one of our top prospects," Randolph said Wednesday. "You've got to keep an eye on him because he's special."
This day in Mets history, May 11: The outfielders -- Rusty Staub, Cleon Jones and Don Hahn -- hit home runs against Ken Frailing in the Mets' 6-3 victory at Wrigley Field on this date in 1974.
A year later, Staub's single off Will McEnaney in the eighth inning drove in the decisive run in a 3-2 Mets victory against the Reds at Shea. Tom Seaver overcame a leadoff home run by Pete Rose and pitched a complete game.
John Stearns and Steve Henderson hit home runs and Kevin Kobel and Skip Lockwood combined on a six-hitter in the Mets' 4-0 victory in San Diego in 1979.
Three years later, Charlie Puleo pitched the only shutout of his career, and Dave Kingman drove in four runs in the Mets' 6-0 victory against the Padres at Shea.
Seaver pitched the last of his 44 Mets shutouts, a five-hitter, on this date in 1983. The Mets won, 3-0, in the Astrodome.
Mookie Wilson, who had a .319 career average against Fernando Valenzuela, had three hits against the Dodgers starter, and Dwight Gooden pitched an 11-strikeout four-hitter in the Mets' 2-0 victory in Los Angeles in 1984. Gooden won another complete game opposite Valenzuela at Shea on Aug. 27 that year, lost to him at Shea on May 25 the next year, beat him with a third complete game on June 4, 1985, and pitched nine scoreless innings opposite Valenzeula in an 11-inning Mets victory on Sept. 6, 1985.
Pitching for the Mets in relief, Cory Lidle gained his first big-league victory on this date in 1997. The Mets scored three runs in the ninth and beat the Cardinals, 6-4, in St. Louis.
Coming up: In the third game of the series in Philadelphia, Steve Trachsel (2-2, 4.96 ERA) is to start for the Mets, opposite right-hander Gavin Floyd (3-2, 6.16 ERA).