The Mets are on the verge of clinching their first division title in 18 years. They also can celebrate the return of ace righthander Pedro Martinez. The Mets will activate Martinez from the 15-day disabled list and start him in Friday's game at Pittsburgh. New York has a magic number of two for clinching the National League East title. The Mets last won the division in 1988, although they last reached the playoffs in 2000 as a wild card.