Pitchers Drew Smyly and Shae Simmons not offered 2018 contracts from the Mariners

Mariners pitcher Drew Smyly watches from the dugout after it is announced he will undergo Tommy John surgery. (Bettina Hansen/The Seattle Times)Two talented, but oft-injured pitchers expected to help the Mariners make the postseason in 2017 won’t be back in 2018.

On Thursday afternoon about 30 minutes before the 5 p.m. deadline, the Mariners announced that they had tendered (offered) contracts to 27 un-signed players on their 40-man roster. Those 27 players were under club control as pre-arbitration or arbitration eligible players.

But two of the arbitration eligible players from Seattle’s 40-man roster — left-handed starting pitcher Drew Smyly and right-handed reliever Shae Simmons — were…