Colts start searching for answers after mistake-prone loss

Indianapolis Colts running back Marlon Mack (25) pushes away Oakland Raiders cornerback Gareon Conley (21) during the first half of an NFL football game in Indianapolis, Sunday, Sept. 29, 2019. (AP Photo/Doug McSchooler)

Oakland Raiders wide receiver Trevor Davis (11) celebrates a touchdown against the Indianapolis Colts during the first half of an NFL football game in Indianapolis, Sunday, Sept. 29, 2019. (AP Photo/AJ Mast)

during the first half of an NFL football game in Indianapolis, Sunday, Sept. 29, 2019. (AP Photo/Doug McSchooler)

Indianapolis Colts kicker Adam Vinatieri (4) reacts after missing a field goal against the Oakland Raiders during the first half of an NFL football game in Indianapolis, Sunday, Sept. 29, 2019. (AP Photo/Doug McSchooler)

Oakland Raiders defensive end Maxx Crosby (98) strips the ball from Indianapolis Colts wide receiver Parris Campbell (15) during the first half of an NFL football game in Indianapolis, Sunday, Sept. 29, 2019. The Raiders recovered the fumble. (AP Photo/AJ Mast)

Oakland Raiders linebacker Nicholas Morrow (50) tackles Indianapolis Colts quarterback Jacoby Brissett (7) during the second half of an NFL football game in Indianapolis, Sunday, Sept. 29, 2019. (AP Photo/AJ Mast)