Quick Hits: Zunino, Tigers, Ishikawa, Astros

The Mariners' promotion of Mike Zunino will give the club some 40-man roster issues down the line, writes Dave Cameron of U.S.S. Mariner.  While none of the players on the chopping block for future roster shuffling project to be superstars, "the reality is that if you toss a half dozen fringe prospects overboard, you’re going to end up regretting it," Cameron writes.  Here's more from around baseball..

• The Tigers have been looking hard for a closer and will continue to do so, tweets Danny Knobler of CBSSports.com.  Jose Valverde had a rough outing today versus the Royals as he surrendered a game-tying two run homer in the bottom of the ninth to Lorenzo Cain.
• Travis Ishikawa can opt out of his deal with the Orioles soon and Dan Duquette wouldn't be surprised if he lands a big league job, tweets Roch Kubatko of MASNsports.com.  Tim Dierkes first learned that the first baseman can opt out of his minor league deal on Saturday.
• Michael Foltynewicz is evolving into the Astros' best pitching prospect, writes Brian T. Smith of the Houston Chronicle.  The No. 19 overall pick in the 2010 draft entered the season as the No. 5 prospect in the club’s farm system, according to Baseball America, and he has only added to his buzz since then.
• The Angels considered drafting former Florida football star Tim Tebow years ago but he had to be scrubbed from the draft board when he didn't send a completed information card to them, writes Alex Speier of WEEI.com.
• It's too early to determine who will and won't be available at the trade deadline this year, opines Ken Davidoff of the New York Post.