The Sporting News thinks so:
The closer seat is getting hot in Houston as Lindstrom has blown two straight saves and three of his last four opportunities. Since locking down 10 straight saves to start the season and allowing runs just twice in that span, Lindstrom has been roughed up for six runs on 11 hits and five walks in his last four outings (4.0 innings). During the recent struggles, his WHIP has jumped from 1.19 to 1.67. That's much closer to what we expect from Lindstrom, who finished with a 1.65 WHIP last season for Florida while losing his closer job. With experienced closer Brandon Lyon pitching well enough (3.47/1.33), don't be surprised if Astros manager Brad Mills decides to make a change.