Oz,
The Mariners have one of the best left-handed batters in the game, Icheru Sizuki, a Japanese import who is lightning fast and uses the other advantage of the left handed batter, standing in a batters box two steps closer to 1st base, to beat out a lot of infield hits, and get more than 200 hits every season, quite an accomplishment. He is also an excellent outfielder with a canon for an arm.
The Mariners also got one of the all time greats, Ken Griffey, Jr., a certain hall of famer, back at the tail end of his career (he played his first 5 or 6 seasons in Seatle, before heading elsewhere as a free agent). If he stays healthy he will probably produce 20-25 home runs. The problem with the M's is they have a very low payroll, and, accordingly, have difficulty retaining the good young players they drafted and developed once they become free agents. Over the years several hall of fame caliber players, including Ken Griffey, Jr., Alex Rodriguez (arguably the best player in baseball, with 3 MVP awards), Randy Johnson (an incredible 6'11 tall left handed Pitcher who in his prime threw in the upper 90's, won 3 Cy Young Awards [the pitcher's version of the most valuable player award] and is coming up on his 300th victory, placing him in the top 30-40 pitchers in major league history, and Tino Martinez (a first basement who left Seatle for the Yankees and won 4 World Series titles and five AL pennants in 6 seasons), have left the M's in the prime of their careers to seek money and championships elsewhere. Not that long ago, in 2000, the M's set the all time record for the most regular season wins with 116 (but lost to the eventual world champion Yankees in the playoffs). This year, I wouldn't expect the M's to win their division (the American League Western Division) because both the Angels and Oakland A's have better pitching.