Were affected by the unannounced repetitive shoulder injury. And before a beaning on Aug 23 bruised his forearm he was... wait, I already did this and you copied it to a front page...
http://seattlesportsinsider.com/blogs/sabermetrics/lengthening-the-lineup
"I liked Heredias .734 OPS through the 23rd of August, when the injury...Beaned in the forearm multiple times in a week? This is a thing now? OK. Then he played the final 28 straight games amassing .377 OPS of futility. .734 to .652 in a month. Now everyone sees a much lesser player than he was every time they see his 2017 line. Hoping for a swift recovery. He's still going to be my 2018 jersey."
He is up to 950 total stateside plate appearances but handles pitchers from the box better than most of the veterans on the team. I've never thought Gamel should start over Heredia, unless it's to send Heredia down to focus on pitcher reads, timing and stealing. His OBP Aug 23 represented his lowest stateside at .347. That with 14 2b, 6 HR, 46 K, 21 BB in 329 PA. Interestingly, the team was 52-43 in games he was in to that point. I'm sticking with my preference of H's flanking the Dee out there.
Basically still think Heredias upside is not yet fully established whereas Heredia (through Aug 23) is probably Ichiro's upside. Give (some defense) or take (some steals).
The biggest point right now is the only OF that's fully healthy wasn't even an OF 6 months ago. Ichiro may not be the last brought in. Well Andereoli, Lake or Perkins might be worth a longer look if anything else creeps into the season.